CS2 has first class linux support. I'm on cachyos specifically, and on my machine it has better performance than on Windows (I made the comparison a couple of months ago, so pretty recent)

It works better lol.

That being said CS2 runs substantially worse than CSGO. It at least kicked my addiction when it released, since it no longer ran at acceptable framerates on my laptop ahaha

It depends what are your expectations.

I thought it was fine, until a competitive player, friend of mine who has a machine comparable to mine saw the game running on mine and noticed a lot of stuttering and framerate loss. I don't believe it is a machine performance issue (Threadripper Pro 3XXX with a 3080p), and I was running a pretty standard Gnome Fedora 43 with NVIDIA drivers.

So if you are into competitive gaming, I guess it is debatable.

Within the past month or so there was a fix for rtx cards that should unlock a massive performance increase for certain games. Only applies to rtx 30xx, 40xx, and 50xx. Search terms are "vulkan descriptor heap" if you would like to know more. It's very fresh so you'll need an up to date distro.

This is a pretty interesting topic.

For GO, switching to Linux (with an AMD card) was a free performance boost. I gained like 30fps.

For early CS2, the performance on Linux was terrible.

Now, the peak fps is slightly worse, but the frame pacing is much more stable. Eg: you get less fps, but also less fps drops.