It's not just the US. I think most Western democracies are in decline.
.....
Actually it's all gov'ts. The difference is dictators in whatever flavor they want to claim just kill off the complainers and censor the press so we don't hear about it so much.
Frankly I think the world is in decline, humans will continue to ruin the world and eventually kill themselves by making the world unable to support human life...
The lake at my cabin, in 1930 was so full of fish and life, my mother would row across the lake with a line in and catch 3 lake trout. She would only do this on the return trip as otherwise she'd have too many fish.
Now you can fish all day with the latest tech and be lucky to catch one.
Now they stock the lake every year as well.
People over fished it and ruined it. The Crayfish are all gone that I used to see and play with.
Same issue is happening with the Ocean, we nearly killed all the whales and many other fish stocks, and the remaining fish are no longer the same large size but much smaller due to factory fishing ships scooping up everything.
One day the oceans will be empty of fish..
In some ways, I'm glad I'll be dead before the world ends as it's not going to be pretty..