I have an "old" computer that is beefy enough to play games but doesn't meet the arbitrary requirements for Windows 11. I'm not brave enough to try a non-windows gaming machine again.
I've been on Manjaro (xfce image, which feels like XP with updated taskbar search) for about a year, even though in the past I've hated attempts to use a linux desktop (Even came with Steam already installed and working).
At that point your only hope are pirate copies. I was always wondering how that scenario would stand in court. After all, you bought something that was complete, and then, due to someone's arbitrary decision, stopped to work. It's basically a remote kill-switch. Should you be punished for removing the possibility of someone's deliberately damaging the product you bought?
Proton/Steam seem like the only ones who could possibly challenge that at this point.