I regularly meet with tech companies in the 2~10 person dev team range and easily 70%+ still use Jira. These co's have the choice of choosing Jira (i.e. it isn't being jammed down on them by a corporate overlord) yet there's still hate? I don't get it.
I'm beginning to think the Jira hate is simply an echo chamber about perceived overhead of project management by IC (mostly engineers), not Jira the actual product. Yes, Jira is complex, but it doesn't have to be. Most dev teams I know just need a tool to organize task intake and allocation. And most smaller ones use Jira because in most cases it'll come batteries included for a dev team.
PS - according to their financials, Atlassian is doing just fine: https://www.cnbc.com/quotes/TEAM?tab=financials