I was in a very similar situation for one of my startups, a Shopify clone. We grew it to 50+ paying customers but stalled.
I ended up giving up all my shares to the other founders and taking a 2 year trip to Asia. The company managed to survive and was sold.
I don't regret it. Move on, if the team is good, you will reconnect and build something even better eventually.
It helped me make the decision when i was struggling with my startup. The problem with mindlessly persisting is you are not aware of what you're doing. You need to step back and think about why you're staying in. After that if you still want to go on, you should. Otherwise, no.
The key thing, he says, about successful people is they quickly and accurately either choose to abandon something very very fast, or to pursue it through the depressing dip to sucess.
Get dozens of book recommendations delivered straight to your inbox every Thursday.