In less than 15 years the number of pre-geriatric married women (under 35) has dropped from almost 75% down to almost 60%. During this same period, the childbirth-to-couple ratio has dropped from 2.2 kids per couple, down to 1.7 kids per couple. If it wasn't for immigration, the US would be on a population decline.
Whatever is going on with modern dating and relationships, it's failing humanity. I think both low-value men, and women with unrealistic standards are to blame. Not enough guys that are worth a crap today, and most women don't truly know the first thing that a guy actually wants. It's why there are so many incel men and so many sad lonely women who wish they could be married.
Neither one is willing to work for the other side.