I thought we were talking about gamers and Linux users? :p

I have a Framework laptop (Intel GPU) with Arch and KDE, and while I’ve never seen all windows crash when connecting an external monitor, I wouldn’t call it out of the ordinary for one or two to crash after I connect one, especially if I try to drag one to a new position right after.

The System76 scheduler helps to tune for better desktop responsiveness under high load: https://github.com/pop-os/system76-scheduler I think if you use Pop!OS this may be set up out-of-the-box.