I think those of us who have had to suffer through ClearQuest, Lotus notes etc have an entirely different scale on how bad things can be compared to those who appear to really really hate Jira today. I'm not a fan of Jira but atleast it loads, eventually.
Those things were like 20 years ago ? JIRA is working years old. We’ve developed better more simple issue trackers since, such as GitHub issues and projects. Much simpler.