The republican party lost the election despite fielding the most competent, centrist, and generally acceptable candidate since Bush sr, or even including him. The hate fringe didn’t help the GOP, but it’s not what lost them the election either. The republicans still got nearly half the vote despite including individuals who would alienate more than half of the population. It’s not the individuals, it’s the policies that lost the elections.
The issue at the heart is the future vision for the individualist and affluent society that we call the American Dream. All can see that the dream has ran into problems lately. Instead of delivering prosperity and self-actualization America seems mired in social stress and inequality. The parties differ as to what to do about that. The democrats feel that the Dream has veered and want to do a course correction. The republicans are panicking and would desperately step on the gas.