Yes, Hillary is a weak candidate, but she's going to win. Yes, Bernie's campaign is somewhat confusing at this point, but there are reasons to stay in it.
What really has been bugging me about the Democratic primaries is how stupid/horrible the supporters of the respective candidates are. Yes, that shows up in comments sections the most, but even some of the higher profile "professional" supporters are pretty awful to the other side, and usually in counter-productive fashion. Krugman is the one I have mentioned (repeatedly). After I read any of his anti-Bernie columns/posts I just dislike Hillary more. That is not helpful. It isn't compelling. It's just pissing people off because you disagree with them. It's more likely to make them stay home in November, and you don't want that.
Stop being fucking horrible to people who you need to be on your side (or your candidate's side).