I don't know a single woman who truly cares about money, height, or looks to the extent that men are sure that they do. Sure, there are women like that out there, but it's not the bulk of them. Of course, everyone is attracted to physical beauty, and lots of women do care somewhat about height because a patriarchal culture has told them they need to be smaller than their man. Dating apps are 70-90% men so women there do have the supply and demand advantage there, but that's not the only place where people meet each other and most women care a lot more about what else a man brings to the table via personality, integrity, good communication, emotional maturity, etc. than they do looks.

Women aren't leaving dating in droves because there aren't enough tall, rich men to go around. They are leaving because there aren't enough men who have even a baseline understanding of how to be a good partner and how to treat them like a person (rather than a sex-dispensing house elf who puts up with their emotional immaturity). It's true, it's not enough to be a nice guy. You have to bring something more than that to the table. If being with you isn't more interesting, more fun, more peaceful than being alone, they are going to pick being alone (or find someone else who offers those things). You absolutely do need to bring emotional intelligence, self-responsibility, good communication skills, companionship, etc. to the table, and you need to be pulling your weight in the relationship, financially and otherwise as well as have some sort of goals you are working toward, but that's very different than being some kind of "high value man."

Healthy women are not attracted to children. They want an actual man in their life who knows who he is and what he’s about, but romance and attraction are not transactional in the way that you seem to have been taught that they are. And "youthful fertility" traded for "economic resources" is a concept that has been on the decline for the past 75 years. Honestly, I mean this in the nicest possible way - stop reading or listening to the stuff that is putting these ideas in your head. It's not helping. Listen to and read women talking about what they are looking for and believe them - not random men who are still single.

I'm linking you this story again in case you didn't read it before, because he is one man who is really on the right track. Honestly, working on healing your insecurities, improving your people skills, and your look as well as finding ways to own what you have to offer will be your best bets.

https://medium.com/hello-love/how-do-i-change-my-toxic-beliefs-about-women-1686c500ea98