I would say that I always doubted that heaven and hell existed. Or exist. Just seemed like an odd thing for an almighty 'god' to create in order to keep people in line, or reward them? It seems more along the lines of a man made type of invention...man likes a reward system and also responds to a punishment system. I suppose that if I were to imagine a god, or create one...I'd come up with one that mirrors how I think. Because that is all I have a reference point from.
But, more than that was my view of the OT. Genesis, in particular. Before Charles Darwin came on the scene with his theory of evolution, the christian church touted Genesis as literal truth. Then, when the theory of evolution started to make more of a public stance, the christian church slowly but surely backed away...saying...ah, it's just an allegory. It's a metaphor. The Catholic Church actually teaches this now, while I believe some fundamentalist christians believe it to be literal.
Everyone can't be right? If Christians can't even agree on what is truth and not, out of the same book they read from...how can any of it be true? If the OT has these fallacies, then perhaps the NT does as well.
And thus, I went on a journey to find my own truth...my own path. I could no longer support Christianity, because in essence, I stopped believing the Bible to be truth. Both the OT and NT.
I actually read Charles Darwin's story about how his 'faith' unraveled, and it is pretty interesting. He was a very passionate Christian at one point, and I'm not sure he ever gave up the idea that a god could or might exist.
Honestly, it wasn't easy. I think atheism is very misunderstood by many religious people. I say that because I once didn't quite get it. But, now that I hold that stance, it's been very freeing in many ways.
Some days, I do miss prayer though. That aspect of my faith life was huge. Thank you for asking. Not many people are willing to listen. So thank you.