If true, I wonder how much of that is due to self-selection by men who aren't having sex. Having once upon a time been lonely and bitter, I know that men often end up in positive feedback loops that strengthen their not having sexual partners - due to the attitudes they develop towards women.
Isn't it easier to hide these things on a Tinder profile than in a nightclub?
Furthermore, I think that these apps mostly reflect reality. In the offline world fat people would have a hard time finding dates too. Don't you think?
Most of the problems with online social networks and dating apps are not brand new, just a lot more severe.
The apps simply reflect peoples' superficial preferences. It's way easier to swipe left on a photo of a fat guy than it is to reject a fat guy who you find attractive because he is kind and makes you laugh. Personality really is most of it, but personality doesn't come through in apps.
Therapy helps; if you can boost your own self-esteem enough to have real vulnerability without soliciting sympathy it goes a long way to building better relationships. It also helps you see things from another perspective.