"Then Jonah prayed unto the Lord his God out of the fish’s belly"
Teancum Singh used to say that as it was in the days of Jonah, so shall it be in the last days. The Lord's servants may make mistakes from time to time, which may lead to some unexpected anguish, but that doesn't mean the Lord isn't always guiding the church.
You don't need to leave the church if you learn that a leader has done something you think is wrong. Even if it is wrong, you can always pray out of the fish's belly and the Lord will sustain you and see to it that things are worked out for the church as a whole in his due time.
As long as you can believe that God is with us, there is good reason to stay. Spiritual experience should trump disappointment with history or policy.
Which also means that history and policy can't make up for spiritual experience.