How interesting, my experience is completely different - I'm a UX Designer working in a squad and I/we find JIRA super easy to use, allows you to customise ticket types pretty much to our heart's content (including removing stuff you don't need), ditto customising the board and other features, allows us to track changes, comment on tickets, and works reliably. Almost nothing else allows us to do the same. Admittedly Jira has been overhauled recently and is much better than it was, plus some new features have been added. Oh, and there's an app which allows me to do most of what I need to do on my phone super quickly, partially thanks to the notifications.