Bar none, the biggest issue with snowboarding is its brand which represents immature douche bags. Its cool to hate the big brands and love the little ones for no other reason then because if something isnt main stream automatically makes it better. Nothing more.
Wearing ridicules cloths instead of good looking functional cloths to make some sort of "im a stoner, life is only about snowboarding and I live in my moms basement" look. Siiick?
So yea...the biggest problem with snowboarding IMO are 99.99% of snowboarders.