He would have won in the general. The primary is not reflective of the general electorate. This is the whole point.

All of these can be true simultaneously:

1. Voting for Kamala was 100% the right thing to do, and
2. The Democrats, including Kamala Harris, have a fucking horrible right-wing platform
3. The Democrat party needs to be thoroughly dismantled in favor of an actual leftist party

a bunch of centralized platforms?

This is what decentralized means. If your home instance goes to shit, you can just move your account to another one.

You could also come over to Illinois. It's shaping up to be a stronhold for the Trump resistance as well.