To be fair, I mentioned that because that's one of the biggest dealbreaker features today in many distributions (I think.)
I think there are few specific pain points in linux that always get brought up. Other than that, desktop linux is truly great.
- Suspend/Hibernate on lid/close open. (Never had trouble with this on my hardware.)
- Detecting, handling, plug/unplug external monitors. (everyone seems to come up with their own way to handle this)
- Discrete graphics switching/drivers.
- Package management. (Too many different standards, and non-truly rolling release)
My biggest beef with most distros is that every time a project reaches maturity, the rug gets pulled from under it and a brand new X (heh) is the next goal.
I've experienced this twice. Ubuntu 10.10 was peak Ubuntu for me. And Lubuntu 18.04LTS was peak Lubuntu. Both times, everything changed for the next release.
There are reasons to start from scratch, and I'm not qualified enough to comment on the decisions made by these projects, but they killed the distro for me at those two times.