That was me.
Beyond that, Democrats are terrible at getting down in the mud, really they have neither the balls, nor the stomach, nor the strange ability to forgo all attempts at ethics and morality. They try, and they fail and they look stupid. Republicans are always willing to get dirtier, sink lower, and be bigger bastards than the Democrats ever will.
Unfortunately, his ideology is not unheard of in the Democratic party, in fact is it quite common, however the logic is usually applied to political policies rather than electoral behaviours. When the Republicans dive to the right, the Democrats follow, thinking the only way to win is to cater to the slightly less right. The Republicans respond by driving further to the right, and what do Democrats do? They follow right along. But the Democrats suck at being that far right. They'll never be that far right without giving up being Democrats.
It's a terrible strategy, but the Democrats have done it for decades and Clinton was the latest installment. When Republicans went balls-to-the-wall right, the Democrats said "Hey, lets lean to the right to pick up on all this right-wing popularity!" but SURPRISE! Trump out-righted them! He was lower, dirtier, righter than the Democrats could even possibly imagine. And so SURPRISE! The Democrats lost.
Bernie may not have been the right choice, he may have even been a spoiler on the Democrat vote. But when Republicans veered right, he stayed left. He held his ground and said "No we're not having any more of that shit, we're going our own way." The Democrats are terrible at this strategy, they always have been, and it continues to cost them elections because their reactive policies continue to be formulated in response to the positions of their opponents rather than founded on the positions of their supporters, and it has cost and and it will cost them every goddamned time they do it.