I have this exact GPU and can game everyday on my Linux computer with very good performance, so I am not worried for you, you will find a way to fix it. I don't know about this game in particular but for each game I install, I always check protondb website for other user experience on the game and copy past the commands other users recommend. Then I paste the command in steam settings for the game. Moreover I use feral gamemode which helps improving performances, and proton ge.
I have this exact GPU and can game everyday on my Linux computer with very good performance, so I am not worried for you, you will find a way to fix it. I don't know about this game in particular but for each game I install, I always check protondb website for other user experience on the game and copy past the commands other users recommend. Then I paste the command in steam settings for the game. Moreover I use feral gamemode which helps improving performances, and proton ge.