Most women go after the top 5% of guys. Obviously, the math doesn't work for marriage. Plus those top 5% guys don't have an incentive to get married.
Eventually, these women hit their 30s and start to lower their standards - to more realistic levels. They get married and have one or two kids, but they're not happy. They had to settle. Once they're done having kids they'll be looking for a divorce. They'll use the courts to get that divorce, child support payments and possibly alimony.
For the women who don't settle, do the math. There simply aren't enough top-level guys to go around.
Now guys are talking about this - a lot. Guys' channels on YouTube analyze various scenarios with dating and marriage. They often show a TikTok clip by a woman, then the host of the channel analyzes it for men. The general conclusion that men are coming to is that women aren't worth it. Marriage is not worth it given the ease of divorce and its impact on men.