Actually, I have seen first-hand examples of gospel growth that have led to church decimation.
The Bible has been preached.
The leadership of the church have hated what they heard.
They have moved to muzzle the particular teaching of the Bible that they objected to.
They have been successful, and the church has shrunk.
It's a bit painful to watch it happening to good friends, but you have to believe in the circumstances that it is the Word of God doing its work, and praise him accordingly.