general problems of the 2011 BMW 335

I bought my BMW 335i xdrive brand new. . . Ordered in Jan 2010 and delivered on April 19, 2010. Since I've had the car, the front passenger side tire was replaced 3 times (within 20,000 miles) because of pothole damage to the sidewall of the tire. Also, the car required realignment. In August 2012, I had about 22,000 miles on my car and had to replace all of my tires ( except the passenger side left front, since that was the tire that was already replaced 3 times prior to having 22,000 miles on my car) because they were worn out. The bridgestone run-flats are expensive for my BMW. The cost to replace one front tire was $430. Luckily, I had purchased the tire warranty when I bought my BMW. The warranty was $1,000. I feel I am being ripped off though. Why, after spending $60,000 on a new BMW should I have to spend almost $3,000 on tires in less than 3-years of ownership which includes the $1,000 for tire/wheel insurance. I have had at least 12 different makes and models of cars since I've had my license and I have never spent as much money on tires for one car as I have for my BMW. I would like to see a class action lawsuit against BMW and the tire manufactures for producing and selling a product that was intentionally designed to fraud the consumer. They knowingly produced and sold a tire that had a short life-span, highly susceptible to damage from a typical pothole, and expensive to replace. They also offered the most expensive tire warranty in the industry. . . The cost of the warranty indicates that they knew these tires would be replaced often. I will also contact the ftc and bbb.