Things move much faster now.
The British and the French empires collapsed fast.
And that was still decades ago. A demented old creep like Dementia Joe can collapse a country fast.
There were obvious replacement countries for Britain and France and before that Spain. There is nothing even remotely close to replacing the US. Worse case scenario we go back to the Monroe doctrine in which everyone leaves us alone and vice versa bc Mexico and Canada are zero threat. The exaggeration needs to stop. Biden is undoubtedly bad for the country but there are still plenty of wheels in motion moving the country forward and China is in far far worse shape than us in every aspect with no one else even remotely close in their wildest dreams. The US may be an ugly pony but every other country on earth is far worse by an order of magnitude.