Well in Washington’s Farewell Address he literally warned against political parties, despite there already being Federalist and Democratic-Republican parties forming. To give a simple answer, I think he wouldn’t be surprised by the country’s polarization with our rough history of influential parties, but would be disappointed that his warning was overlooked. It can easily be argued that the two-party system makes the constitution’s electoral college system compromise insufficient in representing its citizens, between being “forced” to choose between republican or democratic candidates or else you’re “throwing your vote away” and not allowing for representation of third party opinion in government influence. I think he would be pretty shocked at how things turned out to say the least lol.