The picture pretty much explains it all. I have absolutely no idea how to fix this. After every restart it got progressively worse till the point my primary monitor is just black. I also note get an error:

Oh no something has gone wrong.

It doesn't give me any other info other than that. Tried to remove gnome and reinstall, recreated xorg.cont.
I've got no idea what's the exact issue or more importantly how to fix it.