Okay so I tore down the timing belt assembly because frankly I didn't trust anything about it after seeing the belt on backwards.
The crank pulley, which was loose when the car was picked up, has been damaged on its mating surface. The crank is, thankfully, harder than the pulley, and is not damaged.The locating key on the crank gear has sheared offThe timing belt is a square tooth belt and the gears are round tooth gearsThe tensioner was not replaced and the bearings are totally shot
Anyone wondering why the belt being on backwards is a problem - you have to understand, if I look at the work someone else has done and they can't even do it right enough to put the belt on the way the giant arrow says to put it on, they clearly cannot be trusted to do anything correctly and the list of total fuckups above is testament to that fact.