Sanders lost because of Sanders. He did not do--reportedly would not do--what he had to do in order to maximise his chances of winning.
As for having anything against women, have you seen, let's say, Alexandria Ocasio-Cortez, or Ilhan Omar, or Rashida Tlaib, or Ayanna Pressley, or Pramila Jayapal, or Barbara Lee (the only person brave enough to vote against the 2001 AUMF), or Nina Turner? Yes, it is those specific people, and it is because of policy concerns. (If you want to see how silly your position is, it's as silly as insinuating that your opposition to Sanders is rooted in secret anti-Semitism.)
And the problem with social media companies is that their rules are too vague and overbroad and get applied not only against the alt-right but other groups as well (and yes, I know you also hate many of the ones on the left that have been removed), at whim without consistency. Twitter, Facebook, and the like are the de facto public square and should be regulated as such, with free speech protections applying there. The answer to bad speech is not to silence it, but to point out how silly it is with better speech and stop it from gaining traction.
EDIT: To reiterate: It is possible for people with radically different ideologies to come to the same conclusion on certain issues while strongly disagreeing on other issues.