I get frustrated with it when I need to dive into basic admin tasks - like spinning up a new project or board. Their admin and setting panels are completely incomprehensible.
Also, Jira doesn't have a story for archiving tickets. Only a straight, permanent, hard delete with no recovery. I got reminded of this the hard way.
-----
We're currently switching to Clubhouse (though a completely unrelated thing was the forcing function). It comes with it's rough edges as well, but it's simple enough we can comprehend it within out headspace.