Here’s a random example:
https://cdn.mos.cms.futurecdn.net/nj3z7ieVrCcgyQkq6myNZ.jpg
Doesn’t look like decline to me. I could cite dozens more examples and not just around technology.
Russia is a good example of a nation in decline: hemorrhaging young people, horrible corruption, cynicism, delusional leaders, and the use of imperial war and dramatic ideology to try to paper over it all.
We do have a lot of dumb problems like a homelessness epidemic that are due more to lack of political will than inability to fix them.
Some are also due to the high priority we place on individual freedom. We’d rather have freedom from detention and to move about than round up the homeless and force them into institutions. We’d rather have shootings than remove the individual right to bear arms. We’d rather have strong property rights than eminent domain people to build infrastructure. Etc.