Frankly I think a huge factor is the affluence of many in the West which they often don't realise they have.

You don't see Asian, African or Eastern European kids disappearing down a tumblr type rabbit hole because those kids still have to work hard if they want a life of luxury. In South Korea parents expect their kids to be studying 17 hours a day. Meanwhile in the West most kids expect to cruise through school, never have a job until they are past 20 and feel their parents and society owe them a debt for that lifestyle rather than the other way round. They really do think their luxury is a hardship, as you can see on the incel sub.

It's been pointed out that zoomers and older trenders look a hell of a lot like the Capital people in Hunger Games. It's because that's what they are. They are the ruling, elite class who take from and oppress everyone else. But rather than enjoy that position and luck they have spent the whole time making themselves depressed and scared with fake victimhood narratives. Well now the recession is rolling in so daddy isn't going to be able to afford ten different colours of hair dye or tube socks anymore and he is going to need you to go out and get a decent paying job. Have fun finding out what real problems are and how little your precious feelings or identity matter.