It is concerning but i do not question he has mental problems, he should ofcourse try to let a doctor reevaluate his condition.

He only self diagnosed for autism and most likely got medication for other mental problems.

I do think he needs help but it is not easy to know what kind and if he really wants it.

Well, it's not that men are immature, it's more complicated than that.
Men can live their lives without settling down for a longer time than women because women's attractiveness to men nosedives after a certain age, while that process is slower for men. Not to mention the ability to have children is on a timer for women. So men simply don't have to "start being serious" as quickly as women. It has nothing to do with being mature or immature. It's just the rules of the game, and the rules define how the players behave.

I don't disagree with what you saying, but there is a fair few that are just immature (perhaps the wrong word) and not grown up.  They think they are a young Lion when in fact they are not no more lol.  They still club with young adults (18/early 20s), instead of shifting into the over 30s/40s pubs/clubs. They look like tools basically.

I tried therapy and medication it did not work. With or without therapy my mental health issues are unlikely to improve and I remain stuck in the same situation. I am sure there are other people out that due to being long term unemployment, disability(intellectual, mental illness or physical) or various reasons make them unemployable and undateable.

Well, if they pull it off and actually succeed in dating/one-night-standing with 20 year olds, then I would simply say that they're acting in their own self-interest and it has nothing to do with immaturity.

But if they don't succeed and yet they still keep trying. Then yeah, I agree, they look like tools.

I am lazy, I have no work ethic, no ambition, I do not see the point in improving my life because I enjoy doing nothing. I do not want to work hard, because I am lazy. I do not ask women out because I am too lazy. I want to win the lottery jack pot, because I am too lazy to work. Putting in effort, going out and making conversations and joining clubs all requires effort, but I am too lazy. My lame excuses and made up self diagnosed Autism/rare illness, I am lazy! I got exposed years ago online after complaining about not finding work after graduating from college, I did not really apply for work because I am lazy! I made excuse after excuse, story after story because I am lazy.

I know how addicting it can be to just wallow and trudge through your own misery, but you need to pull yourself out of the dumps. Romance isn’t the only aspect of life, despite how much the media makes it seem like it sometimes. You have your career, your family, your future family, your future pets, your friends, and even those acquaintances that you say hi to every once in a while. The “woe is me!” attitude is so easy succumb to, but when I hear the millions of other lethargic teenagers mumble the same words, I feel sick to my stomach. I was not made to be, as Eminem said, “thrown in with these gloomy lunatics”. If nobody loves me, I’ll love myself. And even loving myself gets a little hard at times, I know I’ll be a hell of a lot better at it than all those crushes were.

And ultimately, none of us know the future. I constantly tell myself I’m forever alone, so I can quell the relentless hope that lives and me and constantly expects something good to happen when I like someone, then drives my soul to anarchy when I get rejected. But deep down, I know that life is unpredictable. And somewhere deep down, you know it too.

Dude. Keep seeing therapists until you find the right one. And keep seeing psychiatrists until you find one that can help you.

It's your best bet.

Ok lets take this one step at a time. so work with me here. spent some effort into this ONE post at least to think about and answer each point.

1) Your self-diagnosis - Do you truly believe you are autistic? or using it as an excuse for Laziness? If the answer is Yes, you should really see an actual Doctor not a psychiatrist. Medicine has advanced in the last 10 years more than you know from when you were a kid. You need them to sort you out not therapy. Therapy maybe later for depress or whatever.

2) If you admit you are lazy and not autistic - Laziness believe it or not is still a condition. Usually it means you cannot focus or get bored easily mentally and cannot be stimulated. That is a brain issue (chemical not mental/autistic) that has formed a habit that needs correction.  Laziness does lead to anger, depression, anxiety  and even lack of empathy because of how your brain is being stimulate.  You need to start small to break this habit. I don't know if you live with your parents or by yourself. But that is irrelevant. Start with something like say dish washing. Instead of using a dishwasher or your parents to do it, after you finish eating wash your plate straight away. yes it is boring as fuck. The other think you could try first instead is wake up and make your bed. I know it is easy to to just jump out and get on the couch and watch tv. That is cool but at least make your bed. Takes about 6 weeks to learn a habit and stick with it. Once you learnt one, then add another new thing to your routine. Eventually you will be able to add bigger tasks.  It is all about discipline and time management and creating a structured environment that involves being active. 

https://forums.whirlpool.net.au/archive/1494619
My Low income for life thread on Whirl pool, almost 10 years ago.
Things have not changed, laziness and stuck in the same position of being unemployable, lack of social skills and no confidence.

"I gave up my only full time job paying around $30k a year. To take up a university degree which I had advanced standing in due to college studies.

I completed a degree two years ago and it has been all for nothing. I have been stuck on unemployment benefits since finishing uni. My degree was a complete waste of time, lost time can never get it back. I wish I did engineering, law or something instead of Commerce and maybe a better chance of finding a job. Trade could of been better. Who would take on a mature age at a higher rate?

It is hard obtaining a job when you do not have any contacts, limited work experience and have no car license." 

There were some witty remarks in the responses:

"He can't handle 1 week's worth of 'No's' in a telemarketing centre, what is it you see in his demeanor that indicates he will succeed in a high stress, high pressure, long hours situation?

He will fold, even before he looks at his hand he will fold."

"Absolutely. Best to give up now and open a WoW account

Happy to see that I'm not the only one who has decided the OP is an addict looking for a substance to abuse."

"Why be a slave and be underneath a boss? When you can be your own boss and be self employed. Work your own hours, any time you want. I really hate the hierarchy system and I have a disregard towards authority.

Ahhh..now it all starts to come out.

Thank you for showing us beyond any reasonable doubt why you were, and will be, unemployable. Such attitudes will be visible to a good agent, or large company's HR department or small business boss in your CV, in your cover letter and certainly in your interview if you make it take far.

You have the audacity to suggest that not even Coles and Woolies (with the air of confidence that they employ any old Joe) would employ you.

I just need some good ideas for a self employment business which costs nothing in set up costs. Maybe selling the Big Issue may be an option. Be interesting get to really experience life.

Beyond help."