You described almost every religion ever.
Religion is a mental disorder. Prove me wrong. (with actual studies and not anecdotes)
Religion is one of human basic mental needs, unfortunately. Oh, prove me wrong. (with actual studies and not anecdotes)
Aren’t the least religious countries on Earth generally the happiest ones?
The least religious countries are those without a strong central organized religion. The people there are still mostly religious, just on an individual level - I live in one of those, I can see it all around.

I live in one of those, I can see it all around.

Prove it (with actual studies and not anecdotes)

It’s not my field of study. All I can give you is my experience. Feel free to find some yourself though, if you’re interested enough.