I play overwatch on endeavouros and I have better experience on it than in windows. League of legends will stop working soon. In general most of the games with rootkit anticheat clients will not work on Linux. On protondb you can see rankings and user comments about games. Last I checked 2% of all games are not working on Linux.

What could work is to impose a daily progressing fine until the firmware change Is reversed and 3rd party ink Is allowed again.