I noticed with 24H2, Win11 added D3D12 feature extensions specifically for AI acceleration with GPUs. And they updated the WDDM.
I think MS may be watching your screen using modern GPUs without really telling people at this point. It could explain crashing issues when screen goes off and loses some buffers its trying to watch and it could explain some performance loss.
But IDK. I've moved to "KDE Neon" or "Fedora Kinoite" (or PopOS / Aurora-UniversalBlue for Nvidia systems) for myself or others as its just better at this point. While I still have a need for Windows for work, I recommend getting away from it on other systems at this point.