Disable scaling of certain Xwayland applications
I'm running Gnome-shell in Wayland, with fractional scaling (1.75) This makes all Xwayland windows blurry, but I can live with that. Most applications I need support wayland anyway.
But the real problem are games: they all need X11, so they all run under Xwayland. And they ALL get scaled. And the problem isn't that it's a blurry scale, the problem is that they're scaled at all.
Most games don't need to be scaled because they natively support much higher resolutions. But right now they all thing they're running on a 2192x1233 screen instead of 3840x2160.
Btw: this is actually great for very old games, the ones that only went up to a 1024x768 resolution. Those actually became playable thanks to this. The best of both worlds would probably be the ability to set the scale on a per-window basis.