Maybe he should’ve helped design a political system that doesn’t inevitably lead to a two party system.
Of all of his failings, I don’t think you can really blame that one on him. His time had to balance an alliance of states that had really wanted to be a confederacy with reestablishing (small r) republicanism for the first meaningful time beyond the city-state level in two thousand years.
There’s going to be some misses.
Hmm, but who should we blame then? Our two headed oligarchy is nearly the worst possible attempt at a democracy amongst the developed world and yet it was designed to be as difficult as possible to improve or replace.
Of all the problems the US has, our lack of a functioning democracy is by the most frustrating.