The misery of the people has less to do with how religious they are compared to how religious their Government is. Or more to the point, how much that Government is prepared to use religion as an excuse to shit on the people.
In the civilised world, Governments don't use religion as much, less so now they've got a new stick to beat people with; the stick called climate change.
I will deduce from that that you do not live in the US. And you probably never even visited the US.