Also, try different Proton versions. Sometimes games will only launch or run proper, with a specific Proton version. I personally like Proton GE.
With POP OS, a family member stopped having success launching any game with with Proton, except Half Life 2. I however am on Zorin OS 16, and I am able to launch most of my games with Proton.
Also, its known that any online multiplayer games that use anti-cheat, will never run on Linux. So, if your trying to launch those kind of games, just forget it, blame anti-cheat for not supporting Linux.
Generally, I usually have success rates with single player games.
