i think that bernie was running an honest campaign after he realized initial enthusiasm. then, at some point during the primary voting, i think he gave in, because he saw the signs that they were going to make sure he lost.
tbh they probably have something on him. i think in the emails there is discussion about him having made a deal with WJC or HRC in the 90s. so it's possible the establishment has him neutered.
i do think his campaign was a real attempt to challenge them, though.
but yeah, this along with everything else, HRC is 100% corporate owned