Do you have any pics?
My car has 30k miles and the side bolsters are in very good shape. When I get in the car, I make sure to land right in the middle of the seat without rubbing against the side bolster. It's actually a huge pet peeve of mine when people squish the side bolster when they get into my car.
Besides that, I make sure to regularly clean and condition my seats. That keeps the leather soft and prevents cracks.