There used to be a time when Ubuntu was a good OS because it just worked, but it’s not the most stable distribution any longer. I had two servers break on updates (now Debian servers), and I tried the upgrade from Ubuntu 22.04 to 22.10 yesterday and it failed. Compare that to openSUSE where I went from Leap 15.4 to 15.5 Beta and it worked flawlessly and completed in a pretty short period of time. And I just upgraded from Fedora 37 to Fedora 38 Beta and it worked flawlessly. Consequently, two other things that really annoy me is telemetry on by default along with forcing SNAP package use with Firefox being a SNAP package (I don’t like SNAP or Flatpak). Of course these can be changed, but why waste the time when Ubuntu is just a polished version of Debian GNU/Linux which you can run itself or pick one of the other distros based on Debian. For the other ways Ubuntu has failed the community I’ll defer to the post below. But I’ll no longer install or use Ubuntu nor a distribution based on Ubuntu.
https://linuxiac.com/why-ubuntu-isnt-a-flagship-linux-desktop-distribution-anymore/
Update Apr 2, 2023: Ubuntu to drop Snap packages now that Fedora won with Flatpak, but this isn’t enough for me to try them again. Maybe if they drop telemetry on by default and lure more developers back, but it may be too late and the ship has sailed for Ubuntu.