Multi-monitor support that...removes the clock from non-primary displays... Also still no sign of tray icons, keybinds for moving windows between monitors or anything else that was already possible since Windows 7 using DisplayFusion.
Search that is significantly slower than win10 while being "vastly better" only because win10 search was straight up non-functional and win11 can at least find what you're looking for (whether it's in a reasonable order and doesn't reshuffle with every keystroke seems to be a gamble each update).
"Nicer UI" that only a minority of users actually like, removes support for very common configurations, some of which are objectively more efficient for certain use-cases (side taskbar, ungrouped windows...).
Don't get me wrong, if it works for you, that's great! But make no mistake, Windows 11 is a complete dumpster fire from a UX perspective.