I don't think people hate issue tracking system, they just hate Jira.
Yup, I literally just hate their web UI. Once I found the Atlassian-blessed jira "cli" [0] (after searching for a long time for a tui, which is actually what the "cli" is primarily) I have actually be fine with using Jira again. As an added bonus, being a cli has made it easy to interface with using my AI tooling.
And I think most people who hate Jira actually just hate the process their company has imposed inside of Jira.
The vanilla out of the box product is actually quite close to old Trello, in simplicity. But there are so many ways to fuck it up and overcomplicate it, and so many companies proceed to fuck it up and overcomplicate it.