Chrysler - 300m :: 2000 - Ball Joints And CV Axle Broken

I own a 2000 Chrysler 300m, and have been driving it daily for the past three years. The car had 102,000 miles when I bought it, it now has 158,000. About three months ago, at 154,000 miles, the driver side wheel bearing began to hum. Shortly after, before i was able to fix the bearing, the ball joint on the passenger side snapped. I had it towed in to a shop, and the mechanic told me I needed a ball joint as well as a new CV axle.. The mechanic didn't fix the wheel bearing on the other side, and I took the car back as it was because I needed transportation. when he returned the car, he told me that I needed the same thing done on the other side, but that I had a month or so to do it.

A week later, the wheel bearing broke on the driver side, and I returned the car to him. This time he changed bearing assembly, another CV axle, two outer tie rods, new caliper bolts, and new tie rod sleeves. When I got the car back, he told me I needed an alignment, and to go someplace else and get one. I drove the car and it rode the same as it did before, so I didn't get the alignment. Three months later, I have put only 4000 miles on the car and the passenger side ball joint and CV axle just broke again.

The mechanic says that this is because I didn't get the alignment, but I'm not so sure. I've driven cars that needed to be aligned before, and never had any ball joints break as a result. I think that he may have not put it on right, or missed something else that caused the problem. Is it likely that needing an alignment would cause a ball joint to break this quickly, on only one side, or is this guy trying to hose me?