The expectations of a jungler are immense.
It's my favorite role because it's so fun, but i keep quitting because i get those teams. Those damn teams that have way too high of expectations. You need to not only win lane for them, gank constantly (even if you are a lvl6 ganker and they have incredibly safe lane opponents), countergank contantly, and all the jungle creeps do not belong to you. Teams like this just make me hate playing league. look. -the jungler is not there to win lane for you -the jungler cannot always countergank -the jungler will most likely tax if it was a successful gank -the jungler might not gank your lane again if you flame him -the jungler cannot gank when you are pushed to enemy turret -some junglers need level 6 to have effective ganks
Just remember these things.