I remember what my life was like when I was a Christian and the years before that, so there is no question in my mind that freeing myself from all the Christian indoctrination I had been subjected to in my life was the best decision that I've ever made for my mental health. For me, abandoning my Christian faith was a matter of survival since I found being a Christian to be a very painful experience that seriously harmed my mental health, which in turn badly affected my physical health. I don't regret my decision to abandon my Christian faith. I can't speak for other ex-Christians on why they left Christianity, but the reason I shared is why I left Christianity.
I found a that is what I need to do when I was a professional golfer.
Golf started destroying a good walk.
Now years later, I realise it was my state of mind and not the game of golf that was the problem.
Regards Tony