I think the wide gist of this point is correct, but then you're going and doing something a lot of people responding are also doing, which is ignoring the finding and pointing to specific historical factors that apply to your country.
The only real constant I can see across all countries is increasing interconnectedness, human movement, and rate of change. Kids increasingly find themselves living in a world far different from their parents and even more radically different from their grandparents. Laws, culture, school, and parenting all can't adapt quickly enough. If social media is doing anything on its own, it's the same as what regular media was doing but bigger and faster. More information is coming at you from more directions, your parents and family don't know about it, it's increasingly less trustworthy (compare viral Tweet to Nighttime News to wisdom handed down from a grandparent), the perspectives are increasingly divorced and different from what your family or culture would have presented to you.
It's a lot. None of it is necessarily bad. But it's a lot. If dealing with anything at all presents a challenge, then dealing with more of it presents more of a challenge. The threats humans face are increasingly benign, threats to beliefs and identity even as health, hunger, and survival are mostly taken care of. But there are nonetheless more of them and they come at you faster, at least if you stay connected and pay attention, and the human psyche is not equipped to deal with that. We do well with one major threat every few days that is familiar. It may be a tiger lurking in the trees that can kill us, but we know they're there and there aren't a lot of them. Four mean kids at school can't kill you, but they may torment you every single day. A social media feed full of bad events, people telling you the world is terrible, people telling you your culture is terrible, whatever it is, may be "words" rather than sticks and stones, but even if they hurt less, they do hurt, and there are so many more of them. Think of differences in experience from living on an island with a few giant predators who might attack once a month on average, mostly in a specific season, and you're good all the rest of the time, compared to being perpetually covered in mosquitoes and rats. It's breaking a leg but healing compared to chronic pain that never goes away.
Modern life, first with newspapers and cities, then with schools and office politics and rat races, then with 24 hour news cycles and political horseraces, now with social media, and trending toward the latter. The threats are individually tiny but there are so damn many of them that people feel overwhelmed if they can't step back and disconnect.
This is true everywhere and has nothing to do with unions disappearing or the breakdown of family values in the US. These are just the manifestations of modernity as they happened here, but something analogous and equally anxiety inducing happened somewhere else.