Greentext

I'd assume an extreme situation of executive dysfunction combined with some amount of mental illness. Anon's parents are most likely middle class and don't want him to be homeless, and may have not engaged enough with him as a kid/teen and left him to his own devices too much leaving him socially and emotionally stunted compared to his peers.

It's really a challenge that compounds on itself. You feel stunted compared to your peers, so you interact with them less thereby getting less chances to build those social-emotional skills. You pull in more and spend your time isolated and slowly your views of the world get warped by whatever media you consume instead of spending time touching grass and talking to real people in the real world. This then makes it harder to get a job which then makes it harder to go out into the real world to course-correct. As you get older it becomes a bigger and bigger red flag that you've never worked or lived independently, so people are less likely to connect with you. You become more weird and off-putting, and it's just a death spiral that ends with a sink or swim situation of some sort unless the individual happens to connect with someone with the patience to help them build those social-emotional skills they missed out on years before (most commonly a romantic partner or a real life friend)

Throughout my life, I've befriended several people like that. They all have mental or physical disabilities, but you would never know until they told you.

other people pay your bills for you. and give you spending money