6 Months for a pair of bball shoes is pretty good if you are a serious player.
I am not sure what level the OP is, but assuming he is around DIII level, then 6 months is a lot. Your shoes can take a beating, especially if you play in the paint area. People stepping on your heel all the time.
I got a bunch of heel scuff marks on my Blue Lights after playing my friend 1 on 1 the first time I wore them.
I think weight plays quite a role also.
I weigh 160, used to play Monday through Friday back in college. Rotated between four different pairs. (Rose1, Rose1.5, Kobe5, Kobe6)
Only ones that broke down on me were the Kobe 5s. I always wear orthos also. Scuffs, scratches, and smudges are inevitable, but they don't kill a shoe!
My ASG heels look like a kid took some crayons to them.