Whenever i load a schematic it turns into a massive mess. It all stretches all over and makes it basically impossible to use it.

I'm using 1.14.4 fabric to use it and the correct version of litematica and MaLiLib.

I seen it happening with some optifine settings back when schematica was a thing. Backup your optifine settings and try mine:
optionsof.txt

Also, upload at least one schematic that breaks this way for you.

changing to your optifine options did the trick!
It seems that any schematic i use turns into that mess when i have those optifine options, should i still send them? Thanks for the help btw

Sure.
optionsof.txt

I did some extra testing and i have determined that it's using shaders that is creating this issue.

Yes you need to disable Shaders and Render Regions to get rid of the two worst issues that Optifine causes. And also possibly Fast Render to fix some smaller issues. All of these are mentioned on Litematica's CurseForge page.