1. this does not fix it
2. it was working fine for me too, until an update to CS2 broke audio for me and I needed a patch
3. screens upscaler? Like change the monitor resolution? That's the only option with how broken no. 1 is
4. ProtonDB shows that the FPS drops also occur with AMD

I own a 4k monitor, but my GPU can't really handle it, FSR doesn't really help because for some reason it also doesn't reduce Vram usage so the lag continues, I am forced to either play windowed or reduce my monitor resolution to either 2k or 1080p for better FPS, and occasionally CS2 assigns some vital graphics shit to ram when Vram is full and it STAYS in ram, making my FPS hard stuck on 40-50 FPS.

This game was made to be run on even 2gb cards, how does it struggle on Linux like so?

I play on the LOWEST settings, I got 100 FPS on Cyberpunk 2077 high settings w/o rt 2k Res, how does CS2 make me suffer the most out of every other game in my library?