Linux mint has delivered me a consistent experience on the verge of boring (Good for an OS) with great driver support and minimal intervention. I have wandered a long path of distro hopping and can say if you want to screw around, learn linux, and have to care about maintaining it (Like a car or house) try EndeavourOS or other major distros. If you want an OS that works for you without much intervention, give mint a try.
The default Cinnamon DE is quite light, but it also comes with an even lighter XFCE version. I prefer Cinnamon because it just hits the right spot for what I knew computing to be.
As long as anti cheat keeps only supporting windows you will need it to experience all games. You can go through the labor filled process of trying to VM windows with GPU passthru, but at that point are you really much better off? I swear one day we will get to a market-share that is worth supporting, but it just isn’t there yet. Even fresh titles like Battlebit support anticheat that is incompatible with linux.