The hatred for atlassian products, IMO, has a root cause in a few facts:
1) it's an enterprise product, so the typical enterprise issue of: it's not being sold to the users, the people who it's being sold to don't have to feel the pain, and checking off features is more important than UX.
2) that said, it's not the worst enterprise. It is possible to configure atlassian products to have a really smooth UX (can't say the same about speed, the last I used atlassian, it was really, really, slow though that may have changed). However, wrangling the product (and its users) is almost a full-time job, and atlassian is known to have breaking transitions that mess up your workflow with no recourse to go back to classic. Change management is hard.
3) a lot of higher ups who make the choice of using atlassian even if they are technical and once were a user of atlassian products, used it in an era where it was simpler or worked in an environment where they were privileged enough to have a full-time wrangler from 2)
1) it's an enterprise product, so the typical enterprise issue of: it's not being sold to the users, the people who it's being sold to don't have to feel the pain, and checking off features is more important than UX.
2) that said, it's not the worst enterprise. It is possible to configure atlassian products to have a really smooth UX (can't say the same about speed, the last I used atlassian, it was really, really, slow though that may have changed). However, wrangling the product (and its users) is almost a full-time job, and atlassian is known to have breaking transitions that mess up your workflow with no recourse to go back to classic. Change management is hard.
3) a lot of higher ups who make the choice of using atlassian even if they are technical and once were a user of atlassian products, used it in an era where it was simpler or worked in an environment where they were privileged enough to have a full-time wrangler from 2)