I’ve never heard a single position of hers that is too liberal. Even Andrew Yang was given his time to make his case. Voters said no.
The problem is that she’s not actually popular enough with voters to get elected, let alone popular enough in the liberal half of the country to get nominated. She’s saying the game is rigged because she doesn’t actually have a chance.
The game actually favors her. RCV would help a moderate like Manchin get elected.
If the DNC is too conservative, then she is inversely too liberal for the DNC. And she isnt, it’s not a monolith. She would be more than welcome in the more liberal half of the government.
If she wants to change it, she should join and do so. She might not succeed. That’s how Democracy works. She’d be more likely to succeed though.