Americans (and not just the US) think they still have the influence on the world they had in the 1980s when their economies were a much larger proportion of the global economy. Americans have no idea what the world looks like from Asia which contains most of the world's population and generates a third of global GDP.
But they do and you are bitter and sad that you can’t do a thing about it.
It is a general western problem to some extent, but the US has a a faster growing economy than any of the big European economies. It is still a super-power.