Write a long, nasty, mean-spirited letter to explain everything that they dislike about the church and articulate their own self-pity at length. Entering into, engaging with, and departing from Christ's local body is a significant part of following Jesus.Try to leave graciously. Keep your former church in your prayers and speak well of it. Church members should exercise graciousness and courtesy in leaving a church. As we depart, may we carry Your light into the darkness, shining brightly for all to see. We pray this in the name of our Savior, Jesus Christ.