I tried to install KDE on ubuntu, which involved me doing an
sudo apt remove --purge *unity, a full install of kde and other involved packages. The problem is that somewhere in between I really screwed up and it didn't work, so I gave up and tried going back to unity, but now after getting rid of KDE and reinstalling ubuntu-desktop and unity it does not look at all like it was before, windows don't have the exit/minimize/maximize buttons, there is no dash, CTRL+SHIFT+T doesn't work, the top bar is missing all of the system control buttons (shutdown, settings, etc). I do not know how to fix this and I've tried everything, how can I completely reset ubuntu-desktop and unity?
The top bar that is always visible:
Window control bar in nautilus (and every other window):