Okay, I'm going to be honest.
I've been extremely happy being a single mom. Far superior experience than most of my peers.
Why?
No man drama.
You're asking the wrong question. The question is not whether or not womeb are happier than men but whether or not women are happier with men or without men.
The answer to that will be different for different women. For me, it was a definite resounding yes. Much happier without the man drama.