Proton DB is the place to go. But I don’t check 99% of games I play, unless it’s going to be an expensive purchase and I want to check before I buy. I also don’t bother with people’s suggested tweaks on proton db unless I actually personally experience issues. The only game I’ve had to tweak so far has been cyberpunk 2077.

Edit: added context, I’m on 2 monitors and one of them is an ultrawide. Never had any issues that aren’t similar to issues I’ve experienced on Windows in the past.

Are you buying collector items?