The best I can say of scrum is that it's designed to get some amount of output from an otherwise extremely dysfunctional team. If your teams were achieving nothing, it provides a modicum of accountability. So there's places where yes, scrum is an improvement.

But yes, a team of people that understand the business, and can prioritize well without needing someone to do it all for them, scrum just slows the team down. I've seen it happen multiple times in my career, and sometimes succeeded at either undoing the change, or making the jira-based work basically fictional.