I think you misread that part.

Yeah, I did. Thanks.

The thing is Bernie did not win at the end of the day and achieve any of those material improvements because he compromised too much with the capitalist class.

I don't think this is an accurate reading of why Bernie lost. The #1 reason he lost is that centrist Democrats kneecapped him on the eve of Super Tuesday. Obama called everyone but Biden and Warren and got them to drop out, anointing Biden as the One True Bernie Alternative, and leaving Warren to pull away some of the people who never like any of the centrist options. I don't see how this has anything to do with compromising with the capitalist class.