And people behind the scenes suspected that in 2015 yet the political "left" power is so capitalist and centrist focused that they all rallied behind him to get Sanders out of the paint
If Bernie couldn't rally people to his cause, what makes you think he could A) beat Trump or B) work with Congress once he was in office.
Like think about what you're saying critically. Really, really think about it.
The same people you're saying screwed him are the same people he would need for everything else down the line.
At some point you just have to admit Biden was better at networking. The cac has been in the Senate for decades.