>Could this be because modern women have far more social expectations placed on them than boomer men did, and are thus struggling generally speaking more than boomer men had to?
No. "Mental health" concepts have just become prominent in the mythos of young women. Everybody has their struggles and competing over who has the most is not a productive area of discussion. Contemporary young women really like talking about mental health and have their own culturally shared version of psychology diagnosis and treatment. It's not necessarily any better or worse than any previous as psychology has always had a tough time with rigor.
No. "Mental health" concepts have just become prominent in the mythos of young women. Everybody has their struggles and competing over who has the most is not a productive area of discussion. Contemporary young women really like talking about mental health and have their own culturally shared version of psychology diagnosis and treatment. It's not necessarily any better or worse than any previous as psychology has always had a tough time with rigor.