[nonchalance]

Bringing in business is only part of the story. If you don't think that the founder is concerned with the fact that customers are leaving, then you don't have a competent person at the helm and you should jump ship.

But give him another chance. Address the issues you noted, and see if he cares. If you think he's a good person, you probably can explain the importance of keeping good relations and making sure that customers are satisfied (and if he disagrees, you probably should leave)

[throwawayagency]

This is an important point, thank you. I actually received no followup from the founder. Despite these two senior employees heading the account I was working on, I was actually responsible for much of the work of the client's budget, yet despite this I was never approached regarding account performance. Thank you very much for reminding me about this fact.