I know, lame post, but I wanted to say that Linux gaming has gotten soooo much better, to the point that I honestly think my games are running better than on Windows. I've played so many games, but notable ones are Halo: MCC, MS Flight Sim 2020, Satisfactory, Mass Effect Legendary Edition, and right now I'm starting a full playthrough of Dragon Age.
Dragon Age is notorious even on Windows for being a pain because it's such an old game. You have to install the 4gb patch, and even then it's a bit rocky. Not on Linux though! I did have to install PhysX but I googled it and saw it was 2 buttons to install on Linux! Now it's been rock solid and stable, with no crashes.
Linux gaming may have a high bar to learn, but that bar is constantly getting lower! Exciting times!
Yesterday I've spent an hour to figure out how to make Cities Skylines use my RTX 2070 instead of the integrated one on PopOS. For me this is the main issue I face with games. Is having a dedicated AMD card instead better?
Afaik AMD has always been better supported on Linux.
AMD is easier for sure, but not for this. I think you may have to tell proton to use a specific card when starting up, or display. I'd start by googling environment variables with vulkan or proton to tell it which card to use. I think there was something like DEVICE=1 or something like that that you put before your command
I don't think that just by having an AMD card would solve your issue. Granted that with AMD there's hardly any setup required.