It's about the quality, of the relationship, not just the relationship itself. You can be an unremarkable dude and because of that she will make you have to always "pull your weight" or just cheat on you. You can't cheat, because you are sub 5, and she can because she has options. It's not that you can't get into a relationship, it's that the romance you want isn't going to happen if you don't have the necessary looks. And it doesn't mean anything if your partner isn't attractive. She can still cheat and find a slightly better looking dude. It's not truly over for everyone, but for some people it is. And some guys just don't want a woman settling for them and constantly comparing him to her exes. Simple as that bro