If the latter then it'd affect boys and girls equally. The simplest explanation here is likely the right one i.e. the increase in mental disorders is real.
I don’t think that’s true at all. There are real differences between how we treat men and women. And the actual effect we’re seeing isn’t even addressed — if it’s because college campuses won’t tolerate dissent, why wouldn’t that affect men?
Yes, women are treated much better in general especially at that age. Not sure where you got the college campus thing. The article is about teenagers. They mostly haven't gone to college yet.