I think it’s referring to the period when Berni was leading the Democrat primaries in 2020 and implying that Berni was unfairly treated to get Biden the nomination. And I guess maybe that potentially switching to Kamala is a continuation of the deceit.
How did they end up selecting Biden if Sanders (I assume that's who you mean) won and Biden was only fifth? Also seems like Biden wasn't all that popular if he was only fifth, which I guess was the point of the post.
Basically Sanders was winning because all the moderates were split between a few candidates (Biden among them). On the days leading up to "super Tuesday" when 4 big states had simultaneous primaries all the moderates besides Biden dropped and endorsed him and he was also endorsed by Jim Clyburn a major democratic player(also black).
The people who dropped and endorsed all got some position of power. So essentially, Biden played politics and won and many people don't like the politics he played.
The other candidates weren't doing so great and they suddenly pulled out and threw their weight behind Biden. It was collusion to ensure someone like Biden.
Specifically the actions the weekend before Super Tuesday were alarming.
This is the real answer. Biden stomped Bernie in the swing states. You must win those states to win the election. We still don't have a national popular vote. Until then you have to focus on winning the electoral college.
Biden and Kamala were the establishment candidates no one wanted.
At least until Clyburn's endorsement of Biden. That and his warning against Sanders is what made the party consolidate behind Biden. Even Buttigeig the front running establishment centrist dropped out.
2020 was fresh covid and active Trump presidency. It was a very different vibe. But more than anything 2016 broke progressive's shot at executive power for 12 years at least.