Most partnerships don't end up in court.
Most friendships don't end in a fight.
Most customers don't leave in a huff.
Instead, when one party feels underappreciated, or perhaps taken advantage of, she stops showing up as often. Stops investing. Begins to move on.
No, I'm not going to sue you. Yes, I'll probably put my best efforts somewhere else.
Just because there are no firestorms on the porch doesn't mean you're doing okay. More likely, there are relationships out there that need more investment, quiet customers who are unhappy but not making a big deal out of it. They're worth a lot more than the angry ones.