Once you get out of your teens, people pair off one to one. Even unattractive people. I think the issue is more that some guys have extremely unrealistic expectations of what kind of girl they should have. They're overweight, unemployed, and rude to others but think that supermodels should love them.

Also remember biologically men are programmed to seek many women whereas women are extremely choosy. This leads to lots of rejection for men. Men just need to accept that and keep trying with a good attitude to find love.