It's a known bug from upstream mutter. A fix is being worked on and there's a PPA with the updated packages by the Ubuntu developer working on the fix. It resolved the problem on my end.
I started "experiencing input delay / lag in GNOME" since I first used it. It's normal, every thing you click or type requires a 2s animation to show up, usually rendered with CSS themes. lol
If this is true, there is something wrong with your system.
No there isn't. This is a thing I've noticed in all GNOME systems, mine or not. What is happening is that you, like many other people, like to watch an animation when you click on something and I like desktop environments that just get shit down and don't get in my way.
Obviously that 2s was an exaggeration, but still it isn't as quick as KDE or Xfce when moving around due to its animations. Even Windows is significantly faster at launching things, minimizing and maximizing windows. macOS adds more animations than GNOME in some things, but it usually doesn't get in the way on the essential things.
Look I get that a lot of people have this irrational hateboner for Gnome, I know the workflow is very different from the traditional WinUX, and some people don't like that, but buggy?
Gnome is astonishingly and notoriously stable for being a modern, regularly updated DE that leverages modern Linux stuff like PipeWire, Wayland, portals, etc. It's part of why it's used so extensively in enterprise Linux settings, and part of what made so many distros switch to it over the years. It's not a buggy DE at all.
Also, using Gnome and then seeing someone else have a bug, then dismissing the whole project as a buggy pile of trash and saying it needs to be uninstalled from your system? Lmao come off it.
E: accidentally referred to Gnome as a distro 🤦♀️
It's doubly more surprising that it's as stable as it is given the trashy language it's written in. No I don't mean C, I mean the GObject piles on top of it.