Apology accepted.
To be fair, I would certainly prefer for Bernie supporters (and everyone else) to support Warren - but I have no intention of trying to win support for Warren by tearing down other candidates. That would have to happen by poking at reasons why she's the best. That doesn't mean that I have reason to hold back my concerns about candidates, though, of course. Or much with praise/defense for where I see it. On cyber matters, for example, I think that Buttigieg has shown the most savvy and preparedness to handle those matters of the candidates. Bernie's done a remarkable job in a whole bunch of ways, too, much as it feels like a number of the things that have been said as praise for him uniquely by his supporters also apply as much or almost as much to Warren.
And again, apology accepted.
That quite depends on how, exactly, it's being used. There are indeed serious issues with all, but again, not all issues are of the same severity.
Maybe. He has some of the most valuable positives, but also has a number of serious negatives that counterbalance those. That makes it much harder to to properly rate him and pushes notably more people in to the love him or hate him divisiveness. The enthusiasm that he generates is a great plus, though, and that's important. I'll certainly give him that.
Biden never really had actual enthusiasm for him in the first place, which was his biggest flaw all along.
That's probably the biggest problem there, but it's hardly the only one. Still, he's probably managed to do the second or third best when it comes to the candidates' ground games. He's generated a fair bit of enthusiasm, with that said.
Overwhelmingly less than Bernie. More than the others, of course, but there's a large difference on that front. Warren's generating enthusiasm, too, for that matter, but she's got a number of things working against her - not least being a number of rather rich and powerful folks and corporations who are worried that she could actually get her anti-corruption and corporate power limiting plans to actually happen. Even the little things like, say, banning forced arbitration clauses, that are included in her plans are pretty scary for companies that have been misbehaving a lot (and unfortunately, that's way too many of the really big companies).
And might be more disliked among Democrats than Gabbard, if I recall correctly. That's a big disadvantage.
I'm much less certain that Sanders would beat Trump in 2015, but... that has a lot to do with how he actually handled things then. He has certainly built off the gains he made then, though, to get where he is today.