back pockets tear pants

I uploaded two images of what happened to a pair of these jeans that I purchased some time ago. They fit well, feel rugged, and lasted maybe 5 or 6 months before the corners of the back pockets started tearing the seat of the pants open.The thing is, the seat of the pants don't really move that much when you wear the jeans. In most jeans I wear the crotch starts to tear when the jeans start to wear out from use, and that is to be expected when you wear a pair of jeans every week for months straight. These jeans would have lasted longer if it weren't for some kind of manufacturing defect with the back pockets. I think either they used too much stitching on the pockets, which weakened the seat of the pants, or the pockets are made from a slightly stiffer material, which stressed the seat material when they got put through the dryer. For whatever reason, the corners of the pockets got pinhole-sized tears that gradually got bigger and bigger every time I took them out of the dryer.I can't wear these anymore as a result, as they just expose too much of my boxers. No one wants to see holes in jeans like that. Actually I wonder why they put rear pockets on jeans at all - I never use them, and only rarely do I see someone use them to keep their wallet (which I think is kind of stupid, since its practically inviting pickpockets). I only ever use the front pockets to keep stuff. But whatever, if they can fix this issue with the back pockets they would be a great pair of jeans.