I understand where you're coming from.
I would say not to quit though. I guarantee you'll miss it alot. There's alot of times I want to quit, especially this year. We have a tiny band where no one cares. More than half the people are just in it for the letterman, I'm not to fond of well... lets just say the director at all, we play grade 1 music cause we have 8th graders, we get 3's and 4's, etc. There's just alot of reasons. But I stay cause I have a love for music, and if you have a love for music and what you do everyday in band, then I would say to stay in. Cause chances are, you'll really miss it if you don't.
Also region/state and solo and ensemble, and just individual stuff you get to do make it worth it.