The average default path in life for a normal person being raised in American society used to be that you'd get married and have three kids by the age of 30. Doing so didn’t take much effort. Life was almost on rails, leading people to that end. But now the average default life path in American society leads to being a 40-year-old incel. Something has gone terribly wrong.
The American people haven't changed. Human Nature never changes; only technology and culture change. Certainly technology has played a major part in the deterioration of society: the internet is drawing people away from each other, into isolated homes to spend all their time alone on computers.
But also equally to blame is the culture that is now dominant in society—one that promotes individualism, feminism, divorce, abortion, homosexuality, atheism, and nihilism. These are all the opposite of the things that were promoted in the past: community, patriarchy, marriage, family values, chastity, and Christianity.
God is dead, gay marriage is legal, and women smashed the patriarchy. Now we are all depressed and alone.