I've lived in several countries. I've found that things function better, and people seem healthier, in more collectivist societies where there are real, permanent families and communities.
To the point of the book, the way things actually were is that we evolved as tribal creatures. We didn't pick our communities, didn't have much choice of mate, and we did need to rely on our tribes and families. My belief is that's the way we're wired. We're social creatures. That's not the US in the fifties, but rather a statement on the nature of humanity for tens of thousands of years.
Now, we're wealthy enough each of us can be 100% independent. I don't see that as a pathway to happiness, though. The connections I see between people in the US seem so shallow compared to those I've seen in other cultures.
Yes, that does mean I need to repress a lot of "self" to fit in, and bury many issues, but I'm okay with that. The US has a loneliness and a mental health pandemic. The whole place is so incredibly isolating.
And yes, ending a relationship is a failure *for me*. I'm not saying it needs to be for other people. However, I want someone to grow together and to grow old with. I want more people around me too, whom I know well.