Casual Cynic said:
Is it Biden or his policies? I think it's Biden's policies that are unpopular and not the man himself. The fact that he was clearly senile was just the icing on the cake.
You're thinking Biden was ever in charge. When Hilary lost, the Clinton reign as a power broker in the Democrat party was effectively over. Obama was, at that point, large and in charge.
Joe was selected, yes selected, by the DNC over Bernie because they could control him and the media would run cover. Bernie couldn't be allowed to win because he's a wildcard to the Democrat power broker. Sure they think a lot alike but he doesn't consider himself a true party member. He only caucuses with them.
Biden was the puppet. The puppet that they trusted more than his #2 and he literally went rotten in the vine.
No one ever liked him. He lost big time the first time he ran for president. Obama literally plucked him from the trash heap of failing Democrats as assassination insurance. Picking Kamala was finding something dumb enough to be his insurance policy.