After going through my mods and reinstalling them 1 by 1, after having Quark and AutoRegLib installed, I found out that the game crashes before loading when trying to launch with the Optifine Mod.

Here's my crash log
[07Mar2021 00:34:41.756] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, B4NSHE3, --version, 1.16.5-forge-36.0.46, --gameDir, C:\Users\Daanish\AppData\Roaming.minecraft, --assetsDir, C:\Users\Daanish\AppData\Roaming.minecraft\assets, --assetIndex, 1.16, --uuid, 5aada93cfc154444b608c2d2a1aab19f, --accessToken, ????????, --userType, msa, --versionType, release, --launchTarget, fmlclient, --fml.forgeVersion, 36.0.46, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20210115.111550]
[07Mar2021 00:34:41.767] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.0.9+86+master.3cf110c starting: java version 1.8.0_51 by Oracle Corporation
[07Mar2021 00:34:41.805] [main/WARN] [cpw.mods.modlauncher.SecureJarHandler/]: LEGACY JDK DETECTED, SECURED JAR HANDLING DISABLED
[07Mar2021 00:34:42.091] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.onLoad
[07Mar2021 00:34:42.094] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFine ZIP file: C:\Users\Daanish\AppData\Roaming.minecraft\mods\OptiFine_1.16.5_HD_U_G6_MOD.jar
[07Mar2021 00:34:42.098] [main/INFO] [optifine.OptiFineTransformer/]: Target.PRE_CLASS is available
[07Mar2021 00:34:42.337] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[07Mar2021 00:34:42.488] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.2 Source=file:/C:/Users/Daanish/AppData/Roaming/.minecraft/libraries/org/spongepowered/mixin/0.8.2/mixin-0.8.2.jar Service=ModLauncher Env=CLIENT
[07Mar2021 00:34:42.512] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.initialize
[07Mar2021 00:34:45.652] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.transformers
[07Mar2021 00:34:45.706] [main/INFO] [optifine.OptiFineTransformer/]: Targets: 305
[07Mar2021 00:34:46.915] [main/INFO] [optifine.OptiFineTransformationService/]: additionalClassesLocator: [optifine., net.optifine.]
[07Mar2021 00:34:47.502] [main/INFO] [mixin/]: Successfully loaded Mixin Connector [com.qouteall.hiding_in_the_bushes.MyMixinConnector]
[07Mar2021 00:34:47.541] [main/INFO] [Portal/]: Invoking Mixin Connector
[07Mar2021 00:34:47.554] [main/ERROR] [mixin/]: Mixin config imm_ptl_mixins.json does not specify "minVersion" property
[07Mar2021 00:34:47.559] [main/ERROR] [mixin/]: Mixin config imm_ptl_mixins_forge.json does not specify "minVersion" property
[07Mar2021 00:34:47.563] [main/ERROR] [mixin/]: Mixin config imm_ptl_peripheral_mixins.json does not specify "minVersion" property
[07Mar2021 00:34:47.577] [main/ERROR] [mixin/]: Mixin config imm_ptl_mixins_optifine.json does not specify "minVersion" property
[07Mar2021 00:34:47.579] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlclient' with arguments [--version, 1.16.5-forge-36.0.46, --gameDir, C:\Users\Daanish\AppData\Roaming.minecraft, --assetsDir, C:\Users\Daanish\AppData\Roaming.minecraft\assets, --uuid, 5aada93cfc154444b608c2d2a1aab19f, --username, B4NSHE3, --assetIndex, 1.16, --accessToken, ????????, --userType, msa, --versionType, release]
[07Mar2021 00:34:49.336] [main/WARN] [mixin/]: @mixin target net/minecraft/world/server/ChunkManager$EntityTracker is public in imm_ptl_mixins.json:common.entity_sync.MixinEntityTracker and should be specified in value
[07Mar2021 00:34:49.821] [main/WARN] [mixin/]: @mixin target net/minecraft/client/renderer/WorldRenderer$LocalRenderInformationContainer is public in imm_ptl_mixins.json:client.render.MixinWorldRendererChunkInfo and should be specified in value
[07Mar2021 00:34:49.868] [main/WARN] [mixin/]: @mixin target net/minecraft/client/renderer/chunk/ChunkRenderDispatcher$ChunkRender$ChunkRenderTask is public in imm_ptl_mixins_forge.json:client.MixinChunkRenderTask and should be specified in value
[07Mar2021 00:34:49.879] [main/WARN] [mixin/]: @mixin target net/minecraft/client/renderer/chunk/ChunkRenderDispatcher$ChunkRender$RebuildTask is public in imm_ptl_mixins_forge.json:client.MixinRebuildTask and should be specified in value
[07Mar2021 00:35:10.400] [Render thread/INFO] [com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService/]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[07Mar2021 00:35:13.524] [Render thread/INFO] [net.minecraft.client.Minecraft/]: Setting user: B4NSHE3
[07Mar2021 00:35:14.122] [Render thread/INFO] [net.optifine.Log/]: [OptiFine] (Reflector) Class not present: net.minecraft.launchwrapper.Launch
[07Mar2021 00:35:14.151] [Render thread/INFO] [net.minecraft.client.Minecraft/]: Backend library: LWJGL version 3.2.2 build 10
[07Mar2021 00:35:14.633] [Render thread/INFO] [net.optifine.Config/]: [OptiFine]
[07Mar2021 00:35:14.633] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] OptiFine_1.16.5_HD_U_G6
[07Mar2021 00:35:14.638] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] Build: 20210117-013236
[07Mar2021 00:35:14.638] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] OS: Windows 10 (amd64) version 10.0
[07Mar2021 00:35:14.638] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] Java: 1.8.0_51, Oracle Corporation
[07Mar2021 00:35:14.639] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
[07Mar2021 00:35:14.639] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] LWJGL: 3.3.0 Win32 WGL EGL OSMesa VisualC DLL
[07Mar2021 00:35:14.641] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] OpenGL: AMD Radeon R6 Graphics, version 4.6.14760 Compatibility Profile Context 21.2.3 27.20.14535.3005, ATI Technologies Inc.
[07Mar2021 00:35:14.643] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] OpenGL Version: 4.6.14760
[07Mar2021 00:35:14.644] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] OpenGL Fancy fog: Not available (GL_NV_fog_distance)
[07Mar2021 00:35:14.698] [Render thread/INFO] [net.optifine.Config/]: [OptiFine] Maximum texture size: 16384x16384
[07Mar2021 00:35:14.717] [Render thread/WARN] [mixin/]: Error loading class: net/optifine/util/LineBuffer (java.lang.ClassNotFoundException: null)
[07Mar2021 00:35:14.718] [VersionCheck/INFO] [net.optifine.Config/]: [OptiFine] Checking for new version
[07Mar2021 00:35:14.740] [Render thread/WARN] [mixin/]: Error loading class: net/optifine/util/LineBuffer (java.lang.ClassNotFoundException: null)
[07Mar2021 00:35:14.741] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
[07Mar2021 00:35:14.742] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:39)
[07Mar2021 00:35:14.742] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54)
[07Mar2021 00:35:14.743] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72)
[07Mar2021 00:35:14.743] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:82)
[07Mar2021 00:35:14.743] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:66)
[07Mar2021 00:35:14.755] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: java.lang.reflect.InvocationTargetException
[07Mar2021 00:35:14.755] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[07Mar2021 00:35:14.756] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[07Mar2021 00:35:14.756] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[07Mar2021 00:35:14.757] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.reflect.Method.invoke(Method.java:497)
[07Mar2021 00:35:14.757] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51)
[07Mar2021 00:35:14.758] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$493/1929661663.call(Unknown Source)
[07Mar2021 00:35:14.758] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
[07Mar2021 00:35:14.759] [Render thread/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: ... 4 more
[07Mar2021 00:35:14.759] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
[07Mar2021 00:35:14.760] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
[07Mar2021 00:35:14.760] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:223)
[07Mar2021 00:35:14.760] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at org.spongepowered.asm.mixin.transformer.MixinTransformationHandler.processClass(MixinTransformationHandler.java:121)
[07Mar2021 00:35:14.761] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at org.spongepowered.asm.launch.MixinLaunchPlugin.processClass(MixinLaunchPlugin.java:131)
[07Mar2021 00:35:14.762] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:154)
[07Mar2021 00:35:14.762] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:85)
[07Mar2021 00:35:14.762] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120)
[07Mar2021 00:35:14.763] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:265)
[07Mar2021 00:35:14.763] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:136)
[07Mar2021 00:35:14.765] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:98)
[07Mar2021 00:35:14.765] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
[07Mar2021 00:35:14.765] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.optifine.CrashReporter.extendCrashReport(CrashReporter.java:126)
[07Mar2021 00:35:14.766] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.optifine.CrashReporter.onCrashReport(CrashReporter.java:38)
[07Mar2021 00:35:14.766] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.minecraft.crash.CrashReport.func_71502_e(CrashReport.java:227)
[07Mar2021 00:35:14.767] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.minecraft.client.Minecraft.func_71377_b(Minecraft.java:718)
[07Mar2021 00:35:14.767] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.minecraft.client.main.Main.main(Main.java:158)
[07Mar2021 00:35:14.768] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: ... 11 more
[07Mar2021 00:35:14.769] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: Caused by: org.spongepowered.asm.mixin.throwables.ClassMetadataNotFoundException: net.optifine.util.LineBuffer
[07Mar2021 00:35:14.769] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transformMethod(MixinPreProcessorStandard.java:741)
[07Mar2021 00:35:14.770] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transform(MixinPreProcessorStandard.java:726)
[07Mar2021 00:35:14.770] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:297)
[07Mar2021 00:35:14.770] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:267)
[07Mar2021 00:35:14.771] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1271)
[07Mar2021 00:35:14.771] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:287)
[07Mar2021 00:35:14.771] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:345)
[07Mar2021 00:35:14.771] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:569)
[07Mar2021 00:35:14.772] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:351)
[07Mar2021 00:35:14.772] [Render thread/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: ... 26 more
[07Mar2021 00:35:15.653] [VersionCheck/INFO] [net.optifine.Config/]: [OptiFine] Version found: G6

Unfortunately, Optifine is unsupported due to how it messes with the internals of Minecraft.
Remove Optifine and report if the issue persists, or open a ticket on Optifine's tracker here.