Among other things... There's real dissatisfaction among the working class which inspired people to support both Bernie and Trump, and to vote against the status quo.
But the problem is, they remember that they used to live better just a few years ago, while simultaneously seeing others (political and financial elites) getting richer and richer. That gives even myself a fundamental feeling of unfairness, even though as a programmer I'm far from Trump's target demographic (although still working class).
If that is your basis for voting, flip a coin. No single candidate is going to change that, and its not clear if it is even possible to revert so dramatically.