Yes, I do agree that you have a level of personal responsibility towards yourself - and that you owe it to yourself to make the best of the hand you're dealt.

But turning 18 doesn't suddenly absolve your parents of their failings. If they failed to teach Anon the basic life skills that would help them to be a proper member of society, then that is still their failure - even if it is a failure being further exacerbated by Anon themselves.

As @some_kind_of_guy@lemmy.world said, your last paragraph negates itself...

A good parent would've forced Anon to learn those skills, and wouldn't just stand-by going "they're an adult now, not my problem" - nor would they coddle them and allow them to be a NEET. Both are forms of neglectful parenting, as I said its a lifetime job.