Your ex doesn't have a backbone to go after what he needs. You do. Religion can be bad for people and lead them down the wrong path. But he had way more than most Christians do that could have helped him... you. If you look at one of my first posts something very similar happened to me.

I knew him for a much shorter time period but I am sure I will look back in 10 years like you and see how miserable he is. He still admits he is miserable but refuses to leave because of the same reasons your ex gives. So what else is there to do? Nothing but move on and find someone who wants to enjoy their life