When I was a kid, pretty sure I am not that much older than you, this was considered being introverted and shy. I have experienced a lot of these things and tbh, i still don't like being surrounded by people as they drain your energy. I can only handle 5 people at a time, unless its on the sports field or requirement of work because at that point work all you are doing is focusing on the task at hand.

The best part about work and having to present to different people who rely on your technical expertise (especially if they much older than you) is you learn to come out of your comfort zone. It is the best thing to have happened to me. Presetting to many people has made me less anxious and able to tolerate random conversation.

Okay, let me point out that there are people out there who think that the "unattractive men" are attractive. Everyone has a different taste from each other. 
I don't agree that if you're unattractive, people will assume you're a loser. Your chances of getting a girl will probably be lower, but a lot of people don't think you're a loser. 
Also, making friends isn't based on how good you look, it's confidence, and how nice the people are.
Honestly, just seems like you're the one labelling them. 

Back in the 20th century Autistics were written off as a lot of things; introverted, shy, or more problematically, schizophrenic, bipolar, or psychopathic. Prior to the 1990s, the vast majority of people on the spectrum went undiagnosed and mislabeled.

Autism was generally very poorly understood up until quite recently; even now we're still unraveling its mysteries. I myself went undiagnosed until the age of 19 because I lived in a country town far away from any specialists and because I didn't fit the narrow, stereotypical view of what autism was thought to look like back in the 90s and early 2000s when I was a kid.

And yeah, I too found that pushing myself out of my comfort zone and exposing myself to the things I struggled with in a gradual and controlled way was the best thing for me in terms of building my resilience.

Life is hard when you grew up with no positive male role models, no brothers, no older male cousins and no friends. I have always felt all alone in this world and it is easier to just withdraw and play video games and watch TV and I do not bother with social situations. My Autism: social awkwardness, social anxiety, extreme introversion. inability to read body language, tone deafness, I avoid eye contact to avoid negative responses. My emotions overwhelm me so much that I am in constant fight or flight mode, stress/anxiety building. Social interactions are so draining and I find it is better to avoid them. 

I knew at 16 I had absolutely no chance with dating so I never bothered with asking women out. Risk having their brothers, cousins, Beta white knight orbiters beating me up is not worth it. Just accepting I had no hope and just give up was easy. I sent a few messages on dating many years ago but no responses and deleted my account and just accepted forever alone! Many Autistic males are undateable and face many struggles throughout their lives.

An Australian mate of mine claims: "I am a medical doctor, I have millions of dollars, I own investment properties, I own a Porsche and wear European designer clothes but sill women never want me. I work hard and get nothing in return for all of my hard work. Life is not fair! I am forever alone 36 years old virgin, medical doctor!"

Work hard, get rich, not enough, never enough. Life is not fair! You work hard, you expect return on investment! Maybe I live in rubbish country and if I lived in any other country, my life would be different! Australia is far worse than America. Americans have it hard, go and live in Australia. Millionaires are leaving this country to look for women in foreign countries says it all. 

Personality disorders involve very rigid and maladaptive perceptions of oneself and other people. Everything gets set into stone somewhere during adolescence or early childhood and from then on your behavior and mindset in different situations is pretty predictable and always self-sabotaging, never learning from mistakes and growing personally.

It's actually good for incels to never have been approached by women because for a person like that it's really unsettling and illogical that as soon as you and your classmates hit puberty the very same girls who shunned you before are now hitting on you big time. A damaged person can only resolve this mental conflict by rationalizing that the girls are just cruelly duping him into thinking they actually liked him so that they can embarrass him in front of everyone. Then the damaged person either ignores the hints or acts like a total rear end in a top hat, and either way will soon find out that he just screwed up big time and will grow up to be an even more bitter sadsack than if no one ever actually had shown any interest.

Feels like you describe any gamerforum or 4chan

Bullshit, I know plenty of ugly dudes with women.

It's not just being ugly that makes men unattractive to women, It's having a bad personality, no goals or achievements, no social skills in terms of talking to women (Not talking about making friends), no desire and having nothing to offer in the terms of a mutual respectful relationship.

I'm very handsome and have been told so all my life.

I'm an alpha male. That's for sure.

I've got 2 beautiful daughters. I know where they get their looks from. Their mother is attractive of course, but their father is on a whole different level.

You seem credible.

Totally agree. The rationale that a man ends up with a woman solely based on looks is elementary.

Perhaps if you are in Junior High or High School, a "relationship" can have looks as it's foundation, but after entering society as an adult and taking on the responsibilities of the world, finding a mate that you can spend the rest of your life with won't happen if you are simply looking for someone with good looks.

It's a missed opportunity for the people here that are giving up because of poor looks, and I really hope they reconsider.