Why are you saying that? I googled 'Bernie Sanders lackluster', but the results were articles about how all the other candidates ran problematic campaigns. Anyway, I also find Warren more likeable than Sanders, but my favourite is Joe Biden, who seems more since than either of them.
"wears tinfoil hat"
I do notice a proliferation of candidates for the upcoming elections, in comparison to 2016, when Clinton fought against an unknown independent. Had Killary threatened potential competitors back then?