I've had bad luck in the past being very over ambitious when I was younger and naive just presuming everyone else was the same, in bands this is a big big problem, I'm thinking internationally, they're thinking small tiny local venues, then they wonder why they never get anywhere so I just quit and decided I'm far better off on my own, there's also the issues of money and wanting to make money when for most people it's just a stupid hobby and most musicians hate money with a passion, so in a group situation with the wrong people it can be very counterproductive.