Jira is brilliant. It is team-led. Different teams have different approaches, some love all the features like components, versions, issue types, assignee, kanban boards, scrumms, reports etc etc. Others like my team use it with subject/description/comments. You make the tool fit what the team needs.
Same with slack, you can create and destroy channels around your team -- anyone can create any channel at any point it makes sense -- problem at 3AM, spin up a channel to discuss it, job done. You can integrate and add plugins nice and easy.
Remedy and Teams are led top down. They're designed to be organised, not organic. They're not built for the teams doing the work, but for the people wanting reporting. It's more about monthly KPIs than actually improving performance.
I have no doubt you can use Jira in a "KPI led" way. I do doubt you can use Remedy in a responsible way, but even if you can, it relies on the culture of those selling the tools.
Sadly I fear jira and slack will be next -- they already took Zoom and gave us teams instead, after all we "already pay for teams with office" (which aside from cloud-based email, I, and my teammates, never use).
Never has an anti-trust move been so obvious or damaging.