Um. This isn't really an outlier leadership anymore. It's happened twice, and the vote in favor of it got bigger rather than smaller. Trump campaigned on doing this, and his vote share increased. A large proportion of Americans clearly want America First and America Alone, and maybe they don't understand the consequences of that, but that's what they want. I'm not saying the US is going to collapse, way too big of a bet to make, but to say no one will surpass the US in the near term... I dunno. I think you might be getting caught in American exceptionalism.
I think the world is reorienting itself. It's going to be very painful for us, but we'll get through it. And America will rattle its sabers and dream of Empire.
It's a very polite post on the surface, but do note that they refer to trans women as "it". I think they're being very polite because they know that saying "I think trans women are just deluded men and I don't want to respect those things" doesn't go as well.