I'm curious if you use Nvidia or AMD because for me (a rx 390 owner), Doom Eternal not only runs flawlessly on Linux, it's performance is out of the box better than on Windows. As for stuff like PUBG and Apex Legends, that's a crapshoot thanks to anti-cheat software frequently being hostile to Linux.

Thankfully, there is work being done and at least the situation with Battle Eye has improved in recent years.