It’s actually the opposite. Immediately after Kamala got the nod there was an enormous amount of energy surrounding her nomination that she managed to entirely squander. If Kamala had less time as the main candidate she would have done better. She ran a shit campaign and bled support the entire time. I can’t imagine why anyone wasn’t impressed with her promises to maintain the status quo and her ability to campaign with war criminals from the Bush era.
Opinions are like assholes, I've got mine and you've got yours. Like I said, I think she was a good candidate who didn't get to run a full campaign like her opponent did – and the one she did run was micromanaged by Biden campaign staffers until the last minute – so I guess we'll never know :)