What are you contrasting the "West" with? As a person who lived most of his life in an Asian country with a very strong familial and social construct, I can say that there were no shortage of lonely, broken people there - we as a society just did a better job of hiding it. Perhaps the sense of failure and isolation may have slightly different causes, but that is not to say that Western society is somehow uniquely broken.
I would never say it's uniquely broken. Loneliness and isolation probably exist in every corner of the world. The thing is that the West gets almost everything done right IMHO. It's an amazing place to be. However, the connection and social part of it is not going anywhere. Families are one of the best constructs to build life-long fullfilling relationships, but everyone is giving up on them now. People are not getting married and are not having children, and if they do, it likely ends up in a divorce. As OP said, it's all hookup culture now. How many people will end up single and lonely after a certain age? Lots and lots and lots ... It's a serious epedimic.
I have to agree with the sibling commentator - the freedom to choose the level of engagement with family and society in the West is what drives many of us from the East to leave our homes. I also do not think the Eastern way is a good default for most people. It clearly works for lots of people, but it also comes at a great price for a lot of people. There are aspects of any traditional culture that can be stifling, especially if you don't happen to be at the top of your specific privilege pyramid. Rigid social hierarchy, lack of upward mobility, and discrimination are also deeply ingrained within traditional strong social constructs. Yes, the sense of belonging to the family & society is strong, but it's only a positive if your family values you - which isn't always a given. Yes, the Western social construct as it exists now is prone to certain weaknesses, but I don't think we can make value judgements on which is objectively better for most people. I have siblings who are very happy to remain in your homeland, and I have siblings who left - both would likely be unhappy if circumstances were reversed.
