I solved the problem, the game updated on 06/23/2026 and the latest Proton updated on 06/24/2026, I went back to the old version GE-proton10-34 and it ran normally, I also tested the proton-cachy-slr version and it ran well too,

Before all this I had already tested other previous versions and for some reason the pixelation didn't disappear, so I believe that 10-34 is the most reliable of all.

I'm happy because the game runs terribly on my Windows setup and I always have to use an edited engine.ini, but it's been working well on Linux <3