WTF is wrong with my printer???

[Crt]

It's fairly new. Did lovely prints, then I didn't use it for a couple of months (will now).
Note the missing filament on the bottom layer. It didn't have the problem the last time i used it. I'm honestly not sure if it's a leveling problem, extrusion, cura problem,...
It seems to sometimes just skip printing. The head moves, but the filament feeding stepper doesn't spin or try to spin. The head isn't clogged, at least not 100% clogged. I did try a cold pull with the filament I had, just to be sure.
I did notice that it doesn't push the filament out, so I'm guessing it's not a sticking problem.