We are told america is the best place on earth with all the doors open to you to be rich. That all other forms of government are flawed and we have excellence here everywhere you look.
And then you look at reality and see something else. Sure there are pockets of excellence and the dream still lives in fits and starts, but for the general person, they are likely shut out from any real hope of this grand vision.
You add in COVID and the lockdowns, and economic turmoil, and then people start realizing that the whole race is kind of pointless. I can be poor busting my butt at a crappy job i hate, or i can be poor moving in with family and being 'unproductive' (for some definition of societal unproductivity).
Women, on the other hand, haven't been given the same advertising on the American dream that men have, which obviously is a terrible thing, but in this one sense probably helped them survive and prosper even when life sucks in a modern world.
I'm supposing the sell-job of an equivalence of the 'american' dream in other countries is not nearly so commercial, and blaring. And so kids are likely not so shocked at the difference between expectations and reality. Throw in that many other countries are flat out better in many social structural ways, and i think that explains why, it's especially troubling in America.