It's a W. Look at everything Trump did with *just* the presidency and you know it's a W. Let's not undersell pushing the dangerously autocratqic fascist out of office and demoralize ourselves because of what we didn't win.
Banking your strategy on a repeat performance of something everyone else just watched happen seems like a *really dim idea*, and Sanders failure to grow his coalition and hyperfocus on his own, weakened base seems to have been a strong error in judgment. Sanders' inflexibility has been a mark against him before, and his inability to make inroads to the voters who he needed to win a Democratic primary is on him.
I actually like Sanders a fair bit but he surrounded himself with some of the worst campaign staff I've ever seen to've blown it as badly as he did.