America is in terrible shape. The world without it as the World Police/Bully is not necessarily worse.
Unfortunately since the rhetoric worked in the US, copycats have been multiplying in the west, and it's been working. Whatever the forces at play are, they seem to be the same everywhere. Discontent is a fertile ground for manipulation.
Fortunately, they're copycats, plural, so it won't be a hegemonic force.