Graphical interface keeps breaking

My installation keeps breaking. After a couple of reboots the system doesn’t start the graphical interface anymore. I get stuck at a black screen with the mouse pointer which I can use but nothing else happens. Only a fresh install fixes this. Things I did was change the keyboard layout and timezone. I installed Kodi, Retroarch and Chromium. What might be causing this?

Awkward UI is a missing loading indicator. It’s forgetting to tell your customer where something went wrong. Bonus points for doing so with a scary error message. It’s a graph that looks weird with only a few data points. It’s a linear snap into place when introducing a new piece of data.