You will never be pleased by how they exercise their faith. If they refuse to be defined by YOUR defini, they miss the mark you have set, your opinion of what a Christian should be.
Do Buddhists fail you? Ever meet a hypocritical Hindi? Does it ever knot up your gut that some Muslim isn’t as good a Muslim as you think he should be?
What? You don’t care about how all of those others live their faiths? Live and let live?
Ah, but those Christians...