Wayland has a mouse capture bug in proton / wine. It particularly seems to be an issue in FPS games. That may contributing to slower adoption for Linux gamers.

https://github.com/ValveSoftware/Proton/issues/7564

KDE Plasma 6 made it to Arch about a week before Tumbleweed. Tumbleweed is also still using Xorg by default for Plasma 6. That said both had it in their repos withing 2 weeks of release. Is there some history here for Gnome on Arch?

Can you try using a tool like Crystal disk to check your drive health. Once when I had similar symptoms my drive was just weeks from failing completely.