Hello there. Glad to have a new member here. By the way, it's kind of weird to see you refer to Jehovah's Witnesses as "the truth" since you have never been a Jehovah's Witness yourself. Sort of interesting. Maybe became a habit because of your wife?
When it comes to atheism... You'll be surprised to see that many of the atheists on this forum don't believe in god anymore because some of them have considered all evidence for and against god, including history of Christianity, which was triggered by their urge to first learn about their own faith. From there, it usually spreads to learning about mainstream Christianity as well, sometimes even other religions.
I personally first started learning about my own religion (which now I usually call a cult), and then I began to study the history of Christianity from its very beginning. The reason why I don't believe in god anymore isn't because of Jehovah's Witnesses. It's because of what I learned about Jesus and the first Christians from the historical point of view and how it agrees or disagrees with the Bible.