brake pads and rotors wear very fast

I bought my 2006 Liberty new. At 28000 miles the brakes were shot. Replaced all rotors and pads. Chrysler would not cover it and it was still under warranty. At 48000 miles the brakes were shot again. Everything was replaced again. At 76000 miles the brakes were bad again. They were replaced again. At 93000 they were replaced again. At 109000 they were replaced again. I just had the Jeep inspected today, 122000 miles. The brakes are shot again. What the hell is with Chrysler. I'm 62. As a kid, I always had a Dodge or a Chrysler. I always swore by them because they were reputable and stood behind their vehicles and warranties. Now, today, I swear at Chrysler. They are not at all reliable. The 2006 Liberty was probably their worst year and they don't compensate anyone for their mistakes