My nephew included. He is 34 and decided that his perfectly normal, quite well paid, ordinary post office job was not good enough and he would rather do nothing/be an internet sensation.
His mental health has deteriorated rapidly, he is absolutely without anchor and his mum probably won't ever be able to get him out of her house, able or willing to live independently.
Something went wrong somewhere. It's hard to get past the usual "kids these days" mindset. But there is nothing intrinsically wrong, he just "knows he is worth more than that".
I noticed it in teens I taught too, 10 years ago. Back then being "something in the City" was the end goal for some. Yet they did nothing to make themselves attractive for such a job.
I have no idea what one thing, combination of modern life supports this faulty thinking. But it is quite sad, frightening!