It doesn't matter what she said or what she put on her website; she never tried to create a coherent vision of who she was.
Kamala: I believe climate change is an existential threat and am also completely pro fracking.
The Libs: See, she said climate change is an existential threat.
Kamala: We should have a ceasefire and my support for Israel is unconditional.
The Libs: See, she called for a ceasefire.
Not that this is a particularly new phenomenon among politicians. Heck, it worked fantastically for Trump despite the fact that his speech is essentially gasses escaping from the fermenting porridge that is his brain. The question folks should be asking is why it didn't work for her. Her lack of charisma? The fact that dems seem constitutionally incapable of not sounding condescending? The fact that no one reads candidate websites any more and the campaign's messaging was mostly "Wow the Cheneys like us now 😍"?
Her tactics did work for her. Her base has become immensely cult like and she did have a lot of voters. The actual problem was inflation + Palestine.
You cannot get by with an incoherent narrative on those issues because when people feel things with their wallet or have dead family members, they will pay a lot closer attention.