I went through all of this when I left the church. It’s a terrifying thing to realize that many forms of Christianity operate as, and have morphed into, cults.
Were you in the Jahova's Witnesses? A family friend was a former member, and she told us that the reason they come to your door and annoy you is intentional -- if the only experience they have outside fellow church-goers is people getting angry at them for their faith, it drives them more into it.