> but is anyone actually willing to do anything about it?
They did. They elected Trump.
> no major populist uprising against the dismantling of the institution of the presidency
Some people view the president as the only directly-elected person powerful enough to fight for them in dismantling the rest of a government that isn't working (or even actively working against them). So they implicitly want a strong president.
This only goes as far as the president agrees with them of course.
> They did. They elected Trump.
I would say that speaks more to apathy than activism.
> Some people view the president as the only directly-elected person powerful enough to fight for them in dismantling the rest of a government that isn't working
I think consciously verbalizing a position even that nuanced and esoteric is niche, but there is certainly something to be said for peoples' susceptibility to a type of "strong" cult leader.