Basically all XOrg vs. Wayland issues
- no fractional scaling, or if there is, with big performance issues
- no HDR
- no mixed DPI or FPS
- in total very bad multi monitor support (it was hacked in afterwards, not really intended from the ground up)
No idea about VR but I assume it works well on KDE or GNOME (depending on what you mean, people use Meta quest as an external display)






I can list random things I noticed
I dont use Cinnamon lol, for reasons. Too many family members blindly used it and I hate it.
This is not what a DE is for. If you need a terminal, the DE is not good. I also heavily use the terminal but I am talking about a good general use desktop.
They diverge from GNOME for theming or whatever, and either have weird apps for things like PDF viewing preinstalled, or the people that used it preinstalled those.
As it is neither KDE nor GNOME, it kinda uses GNOME apps but not really. Simply a pretty bad situation. On KDE I use a bunch of GNOME apps and thanks to libadwaita they all look and works fine. That is actually an antifeature of KDE apps, but if you are on KDE they are fine XD
That always results in opinionated defaults. People seem to get along fine and I still have a vanilla LMDE VM I have not tried.
Then maybe look it up ;) it is easy to find. Deb packages have way more attack surface than flatpaks, making this even worse. People install spotify as an unrestricted deb package instead of in a sandbox for example. Fucking spotify.
It is a DE for people who literally know nothing about Linux. The GUI store needs sensible defaults and it doesnt really have those currently due to their controversial (and unsafe) decision to hide unverified flatpaks