A motto for those doing work that matters:

"We can't please everyone, in fact, we're not even going to try."

Or perhaps:

"Pleasing everyone with our work is impossible. It wastes the time of our best customers and annoys our staff. Forgive us for focusing on those we're trying to delight."

The math here is simple. As soon as you work hard to please everyone, you have no choice but to sand off the edges, pleasing some people less in order to please others a bit more. And it drives you crazy at the same time.