You named 8 people who have all backed Biden and are not running. I would also prefer pretty much any of them to Biden, but they aren't candidates. You might as well throw in Jon Stewart and Kermit the Frog for all the realism you have in your list.
You also named 8 people. That's not a plan, that's a menu. You don't have an answer, either. The primaries have happened already, and the Democrats don't have another candidate.
I'll take you at your word that you're not a fascist pretending to be a disgruntled progressive, but this is precisely what a fascist pretending to be a disgruntled progressive would say. A sincere progressive wouldn't attack Biden without a specific path forward or realistic alternative.
So I'll tell you what should be obvious to you: Trump will be worse. If you don't think Trump will be worse than Biden, then you're a Trump supporter. There's only one perspective that creates such a massive blind spot, and that is to be squarely inside of Trump's large colon. From any other angle, you would support Biden.
So, please, vote. I don't expect you to like it. I don't like it. But we can work on the rest once Trump is behind bars. If he wins again, that's the end of our Democracy. It is not an option. Biden must win, and then I'll join your voice in demanding he step down.