That sounds like a typical startup. Are you sure it's as bad as you are thinking? In other words, is this a mismatch of risk profiles or a truly bad situation. Anxiety or legitimate concern/fear?
Usually, lots of stuff in a small business is totally fucked up, but that doesn't mean it won't make money.
Honestly, even if it is going down the tubes, it is likely to be a hell of a learning experience. Learning to deal with stupidity is a valuable corporate skill.
With no equity, the time to leave is when something substantially more interesting comes along or the checks start bouncing.
What I was getting at is that the fact that everything is kludged together in a way that would be unlikely in the corporate world doesn't mean that the product will be unsuccessful - it doesn't mean the job will suck either, though it does make it more likely for certain personality types.
The benefit of staying is that you are likely to see the operations sausage factory and that sort of experience will be harder to come by should you return to enterprise type work.
I'm not saying that staying is the best option, but since there weren't complaints about the workplace culture or pay, the items over which you have expressed concern appear to be very remote possibilities, and there does not appear to be any opportunity cost associated with your career; I don't see any substantial harm should you continue to play Dirty Harry for now.
Good Luck.