iMO gaming and cars.
Young teens stay inside gaming and they form their friendships with other guys there and then keep them as they age. That compounds with the stupidity of car culture and a lack of PT and cycling infra and zero cost places to "hangout" with friends.
How does a 12yr old boy get across three suburbs to see a friends for real, deal with the friends sister and family etc
Hikikomori in Japan, they stay at home, game and goon so who knows ?
solutions ? i (M 58) don't have any but this will get worse, It's also naive of girls/ women to do nothing and worse still to laugh or pearl clutch about it, sure incels, groypers etc arent their problem but it's like hungry people aren't their problem... until they are starving and come take your food and eat it all and all of a sudden...
what a fuckin' mess. I bought a home in a small rural village in the middle of no where on a hill for a reason ;) the entire way we have structured our societies, political and economic systems is wrong and won't change before it collapses and has to change.