Everyone is unhappy, married people on average are happier than unmarried, religious people are on average happier than unreligious people.
The sexual and feminist revolution got some 'splainin to do.
Of course, my view, the answer isn't "liberating women from the bonds of motherhood and family" but empowering women and supporting them in arguably the most powerful and most important thing one human can actually do in this world: bring new life into it.
https://www.theatlantic.com/ideas/archive/2019/04/happiness-...