It's eerie how so many of the posts parallel the OP is talking about, that Bernie is a strong candidate and has momentum etc., but can't possibly win. I beg to differ, he's far from out of it, the fact he's even still in the running against a woman who has been campaigning for 16 years shows some serious weakness in the "coronation" theory. I think a lot of dems wanted a coronation, as I recall at first Bernie was ridiculed severely even accused of riding on her coattails.
I continue to return to the issue of trust. Never mind, at this point, who people are saying they will vote for, but look at the polls regarding trust. Dear Hillary does not fair well. The dems may have spent the last eight years sneering at the continuing probes by the Republicans, but it appears it has taken its toll.
But more than anything, the OP is dead on about 'the establishment' and the mood of the voter's, and if there is a candidate in this race who is more "establishment" than she someone would have to be lying.
I think the ultimate match up is the stolid and polite Sanders against the rude freight train that is Trump.