4chan is teenagers all trying to fit into a certain culture, it's not full grown people expressing their honest heartfelt beliefs.
I remember /fit/ did a survey once, and a good 40% were under 16 (and of course like 60% were above 6'3), barely any were above 21.
You're not exclusively attracted to male models (who don't look as good in real life either), and neither are men. Sure, there's stupidly good looking people out there that people talk about as far as their looks go more often, but there's lots of people who aren't that exceptionally good looking who are still attractive.
Stop looking to 4chan for your idea of what men are really like, because not only are they not like that in real life, but they're not even men. I fucking 100% guarantee to you that if you find a healthier forum to spend your time on, or just generally try to cut your time on 4chan way, way down to like an hour a day, you'll feel much better within a month. It happens to guys there sometimes as well, the attitude on certain boards that you're only good looking if you're a 6'2+ model with an insanely good body all the time is incredibly unhealthy, and it's the same thing you're struggling with now, just with less "CHAD eats PIZZA every night while YOU spend hours COUNTING CALORIES and still don't look as good as HIM" shit.
And please, go see a therapist, you've clearly got huge self esteem issues that like I said, are bordering on dysmorphic.