But that's the way politics works in the USA now: the two parties are so far apart that political oscillation can't be avoided. You get your left/right-wing President in office with control of Congress, and you get a year to ram through your left/right platform. Then the next election cycle kicks in and it's stalemate for 3-7 years, whereupon the pendulum swings to the opposite extreme. Even a moderate Biden is trapped in this cycle.
I think the fix is to change the pluralistic voting scheme to a method that's more tolerant of multiple candidates, such as approval voting or ranked choice. That gives moderate candidates a greater chance of winning office.