During the beta I had to use proton to be able to start the game and was getting anxious about the state of non-Windows versions, but it launched natively and it works fine.

Now you can run a native client on Wayland and pipewire. The only big issue I've seen is CPU starvation on the servers during the launch, but that should get fixed soon.

It's pretty unbelievable that they'd entirely botch CSGO on Linux. But here we are. It's been given little to no consideration with this update. It used to work fine.

I've played it on (Arch) Linux today. It seems to work fine, and I don't see any traces of Wine/Proton/Steam Play in task manager, so I assume it's native.