There's a lot of good reasons why Clinton sucks ass, going back to her time as what amounted to a Walmart lobbyist operating within her husband's gubernatorial administration.

But I'm afraid a lot of people are just voting on vibes. "Hilary is bad because she's sort of weird and off-putting, after years of molding herself into Generic Democrat".

Harris has substantially more personality, which is nice. We also haven't spent the last twenty years basting "Hilary Death List" / "Canckles" / "Ugly Lesbian Uppity B-" 90s tier slander with her. I'm confident the GOP hate machine will ramp that up quick and bombard her with it over the next four years, regardless of whether she wins. Then more people will sour on her.