Recently, i had to move from nixos to windows against my will simpy because of anti cheats. While i dont game that much, the few games i enjoy playing are all online with some kind of anti cheat. I used to dual boot but i was tired of having to wait for my slow hdd to load windows (i only have one ssd). I literally used linux for everything else but because of anti cheats i am forced to move to windows. I managed to make it a little better by using wsl2 and removing bloatware but it will never be the same as linux
My guess is that because those games target DirectX during development then they add a native build at the end that uses Opengl. What Proton does is take the DirectX version and route it to Vulkan. So it’s potentially just the Vulkan usage being better than actually Proton itself.