i changed some things in the quake configs but i dont think that was it, since i also made some uh random commands
but after i did all of that, i kept playing the game normally and nothing had changed, the next day, i open the game and then my world and EVERYTHING WAS DROPPING DIAMONDS

If you changed some configs then this is a user-fault. Backup/move your world folder and reinstall the modpack.

Click the three vertical dots next to the Play button on the CurseForge client and click Open Folder. Your world folder is in "saves".