Have you ever gotten off of dating apps and been outside? Have you been to a mall or a baseball game? There are all sorts of configurations of couples everywhere. Dating apps are 70-90% men. The few women who are on them have supply and demand skewed heavily in favor of them and they will naturally try to get the "best" guy they can, but in addition, you have absolutely no idea who the woman who rejected you actually ended up with. A lot of women are ending up with nobody these days because they can't find enough decent men who will treat them like people and not like commodities. I'm going to guess it's how much you both resent and feel entitled to women that is truly what's in the way of you finding someone.