Honestly, the idea that they might be self aware enough to recognize that running a cop is a losing idea would be an amazing feat for them. I think it's more likely we're dealing with racism here. And yes, many of the the Dems are pretty racist, they just don't realize it or admit it like the Republicans.
VPs have no job except to succeed the president and break ties in the Senate, along with presiding for a few ritualistic things. That's really it. What do expect want her to do?
She owned a couple initiatives, chaired a couple committees, cast a few votes. Surely, something there could have turned into a success. Heck, she could campaign for the ticket, present the platform, cheerlead for her running mate.
First Past The Post voting ensures that a good portion of the people voting for her do not want her. Same for Joe biden. Same for the Republican and democratic parties.
first past the post isn't responsible for that. it's a tactic called "strategic voting" and it results in the consolidation of parties under fptp. the solution is not to vote for people you don't want to win.