Many of the reactions I've seen over the years to these authors' work focuses on some particular frustrations or complaints about American society, the economy, our culture, and so on. The problem with these theories is that none of that stuff abruptly changed in the 2010s, and even then there's no particular reason that a 13-year old girl would be so much more negatively impacted by changes that did occur than anyone else.
Haidt's theory focuses a lot on technological change like smartphones and social media (though it has some other components). Ten years ago this seemed believable because it appeared at that time that teen girls were more interested in these technologies than boys. However, the under-30 mental health problem is ongoing (and may even be accelerating), and yet it's much less clear now that there is any gender difference in technology uptake.
I haven't seen a satisfying explanation from Haidt about the more recent data, and have come to believe that there is no adequate explanation right now.