How to debug a freezing entire system GUI?

I am on Fedora Kinoite to get the most stable KDE experience (as stable KDE is not really possible currently).

Apart from this Dolphin crash bug caused by kdeconnect I also experience constant freezes of the entire system.

  • Firefox URLbar input freezing
  • App launcher freezing
  • app switcher freezing
  • the entire panel and decorations getting unresponsive
  • Signal Desktop input freezing

What would cause this? Its not only KDE Software so I think its bigger.