That major asymmetric wear is a toe in (or out() problem. One needs a slight toe in at front for stability. My JPS had a crazy amount of positive (toe out) set when delivered. As in, nobody ever looked at it, I'm pretty sure. One can set the toe by just using a tape measure and a nice stick. You raise the car, hold a pen ot other marker to the tire , rotate the tire to draw a circle on the tread. Lower the car and roll it forward a a rotation or so, measure the distances of front and back of the circle you drew. Front of tires need to be slightly closer together than the back of the tire, maybe 1/4 inch?? That is: toed in. Tie rods are built to be adjustable for this purpose. Not a really bad shade tree mechanic job, actually. Of course just about any garage or tire store can handle such a thing with special measuring devices. As to the rear, you have posts here that indicate that job is a little different. I've never seen a car with crazy bad toe in the back, but I guess it can happen.