This is an interesting article about the possibility of mental illness, in young people particularly, having been over-diagnosed in recent times.
www.stevestewartwilliams.com/p/over-diagnosing-mental-illness
It is from the Nature-Nurture-Nietzsche Newsletter to which one can subscribe. I am not a subscriber but was able to read the excerpts by simply closing the window offering subscription and carrying on reading. It is not over long.
It quotes from articles in the Economist and the New York Times.