okay so, here is what i did:

updated windows
reinstalled the last nvidia drivers
uninstalled the Inter Driver Support software, that fixed the fps drop for some reason??

but turns out the Mt. Gulg bug is a wide bug not only seen by me, so maybe this thread should be moved to bugs



i'd mark this as solved, but also, well, you might want to fix that because it looks awful and made me worried it was my graphic card/computer when it was definitely not.