How can you say Kamala has no story? Have you even tried to understand her story? From rising as a DA in San Francisco, to AG of California, and then a U.S. Senator of the same, that's a pretty impressive resume and "story", even if you disagree with her politics.
I also disagree that she's as unlikable as you claim. She polls far better than Biden did. And while she wasn't a great candidate the first time around in 2019/2020, she has a better message this time re: turning the page, opportunity economy, etc. Although I'll give you that she's struggled to define these clearly, distance herself or embrace her boss (Joe Biden), and avoid making her campaign all about anti-Trump instead of pro-America.
Finally, you're wrong about her "undemocratic" selection. She was nominated in line with DNC rules (which are very similar to RNC rules). I wrote an entire story on this point because so many people have been confused by it - https://medium.com/the-political-prism/but-kamala-harris-didnt-win-a-single-primary-2929ed18884d