Yeah, they do, they cling to it as the reason why Bernie was "cheated" out of the primary to this day.
If you mean "at least 1 bernie supporter" than sure, but, the great vast majority voted for Clinton. It's true that we didn't vote with much enthusiasm, but we saw in Clinton somebody reasonable and rational.
Not just the 12% who voted for Trump. You left out those who voted for Johnson or Stein, or simply declined to vote. I seriously doubt any of those people were trolls. They are identified as Sanders supporters through polling.
5.7% of votes went to Johnson and Stein. There clearly were some disenfranchised Sanders supporters who threw their vote that way.
There were also disenfranchised conservatives who deplored Trump and would have voted for Johnson.
I think we should have learned by now that polls are often imperfect.
Polls are what told us "Don't worry, Clinton will win by a landslide."
I think media complacency, and the overconfidence and the certainty of Clinton's victory were her biggest undoing.
Also, there was that whole thing with the deplorables. It really riled them up and backfired horribly.
Overall, the vast majority of Sanders supporters voted for Clinton. I think a lot of us feel like the democratic party has been corrupted by plutocrats and corporate interests and is more interested in paying lip service than doing actual change, but, we also recognize that the republican party contains far greater evils. We also know that the 2 party system is broken, and 5.7% protest vote isn't enough to fix it.
Until we have mandatory voting to enforce 100% turnout, and runoff elections when the counts are close, "close elections" will leave half the country feeling cheated.