Sure I lose faith....every time I pick up my Guitar!
From my perspective, you have a ton to be happy about, good enough and talented enough and work-hard-able enough to be in a band, that people watch and enjoy. Thats so cool to a bedroom wannabe hack like me.
Sure, the personal melodrama sucks, but that can be fixed. Next band, make sure you're getting in with folks of a like mind and atitude Rspectful, friendly, fun/hobby/passtime guys. Not primadonna lead vocalist abused his bandmembers types
Keep the faith.