I wish the comments were more specific about which features they don’t like. For me a particularly frustrating aspect is the way the UI moves around a lot. I’m quite anxious to click anything until all the loading spinners have stopped in case I click the wrong thing. Then I could be taken to a page or feature I’ve never seen before. Also it’s really annoying when I try to copy something from a ticket description but…
The biggest issue I have with jira is it's so dead simple for braindead process zombies to cram another field, another label, another required text box, 4 new transition states, 20 difference confusing priorities, etc. Then, require everyone to follow through with this (with 90% of the time putting some form of "not applicable" in the boxes they added).
It is built for anal retentive "rule enforcers" to jump in and chastise you because you checked box 4a but didn't fill out sub box 3c.
FFS, I have an easier time filling out my taxes than some project's jira setups. (And I live in the US).