Try Bazzite sometime. It's plug and play.
ReverseModule
A lot of reports on ProtonDB are ancient. I would say literally 99% of games work nowadays out of the box.
If you want something similar to SteamOS I recommend checking out Bazzite.
Ubuntu sucks ass. Use Bazzite.
Destiny 2 and Tarkov is my guess.
You just log in with your Steam Account to ProtonDB.
I mean we have tons of anticheat games working on Linux. More than people realize. Elden Ring, The Finals, Overwatch 2, CS2, Apex Legends, xDefiant and more that I can't remember right now. It's not that bad even as a multiplayer gamer. The ones that don't work R6S, Val, LoL, Fortnite, CoD and Destiny pretty much.
NVK is slow at the moment, yes. DX12 just started working as well and is not in mainline yet. This is with a particular PR merged.
This is through gamescope.
I'm on another server, that's why. :) Peertube has plenty of instances.
Older versions work, yeah.
Just use Lutris or Heroic for that.