I doubt it was actual Democrats who did not come out to vote in 2016. It was mostly independents. Anybody connected in a formal way to the Democratic Party would have been highly motivated. But over 1/3 of voters are not connected to a Party, and float from flower to flower, voting sometimes R, sometimes D, some times Third Party, and sometimes not at all.

And as for sh*tty candidates, almost all of Hillary's supposed sh*tyness was supplied by Republicans! It was the big lie technique: You repeat a lie enough times and people start to believe it. Apparently you still do, even though Hillary's policies were almost identical to Obama's.