Matthew 26:33-35
Peter replied, "Even if all fall away on account of you, I never will... Peter declared, "Even if I have to die with you, I will never disown you." And all the other disciples said the same.
The sins of men should never cause us to leave the Church. If they did ---considering how St. Peter and almost all of the Apostles DID disown Christ--- the Church would have been dead-on-arrival.
And if I can't abide sinners, I can't abide myself, so where could I go?
The Church is like Noah's ark. Even if it's dark and leaky and pitching wildly, and full of crazy animals (not to mention the smell), it is the means provided by God for my salvation.
If I went Maronite I wouldn't be leaving at all, would I? I left the Episcopal church because of the immorality, but that didn't mean I naievly thought there was none in the Roman Catholic Church. It was because I decided that the RCC was the true repository of Christianity on earth. Furthermore, though individuals, too many of them, behave in an immoral way, our church is not afraid to say what's wrong is wrong. That was very important.