Liferea is currently broken as of the latest update 5 days ago due to https://github.com/lwindolf/liferea/issues/1217
I also suffered from the grub issue mentioned here elsewhere, had to rescue my laptop after it became unbootable (though it was very simple to Google the problem and to fix it). I don't think using grub is particularly unusual choice in packages.
I also had to downgrade Samba and wait a couple of weeks for a fix to a bug it had mounting password protected shares. Again, Samba isn't exactly an exotic package.
Also had to downgrade something in my audio stack (I forget if it was pipewire, pulseaudio or a kernel issue that was the root cause) and wait a couple of weeks for a fix due to bluetooth issues.
There's also the occasional update that requires manual intervention.
All of that said, I don't think I cumulatively spent all that much time on maintaining my Arch systems as all these errors are spread across a long period of time and didn't take that long to handle. I probably spent a lot more time and nerves on Ubuntu as I don't think I've actually ever had a dist-upgrade work flawlessly and each time takes a lot of effort and mental energy.