As I find myself reiterating every time the subject arises here - it's not possible accurately to understand Trump's electoral victory without reference to the DNC's own internal politics and their gravely suboptimal effect on the party's 2016 nomination. Sanders vs. Trump would've been a much more interesting election, and its outcome much more in doubt, than what we actually got; as things were, the choice came down to more of the neoliberal, globalist, job-exporting same on the one hand, and a wild card who at least gave lip service to working-class folks' problems on the other. Granted, it's becoming increasingly clear that lip service is about all that candidate was prepared to give - but that still puts him ahead of his erstwhile opponent, who couldn't be bothered even with that much, not even when it became obvious that to do so would be tactically wise.
You can blame people, if you like, for going with the sole candidate who at least pretended to give a shit about their problems. But what do you imagine it helps, to do so? Regardless of whether or not any individual finds it personally satisfying to despise people who voted in a way that individual does not like, those people did so vote, and here we all are as a result. Does recrimination really offer the most realistic prospect of a way forward that doesn't continue to steer our country along a course toward disaster?