Well, it had holes and cracks in the plaster and so somebody put cheap panels on it. Then, he put wallpaper on the panels, crooked. Then, he painted twice over the wallpaper. The panels were glued instead of nailed.
Solution: Tear the wall down to the bare studs and put up new drywall.
If you want to pick THAT type out of a crowd, just look for the festering scabs on their elbows.