technically, bernie is a capitalist. he calls himself a socialist, but he's a capitalist because he's advocating for policies like what is going on in denmark.
joe will be beaten by trump because a lot of liberals will turn to trump to spite the dnc, and the lack of rich elites supporting biden will cause biden to lose. however, bernie would've won 2016 because of his lack of a criminal record (that hillary had) and genuine policy that didn't just mean "orange man bad".