Some Bernie supporters will vote for Biden, some won't. No one is changing their mind based on posts. It is time for Biden's supporters to get on the phone with all those moderate Republicans you're sure exist and will come out.
You said you could win this, go do it.

I think Trump is garbage so if it makes a difference I’ll give ya my vote in a solid blue state. But I’m not optimistic seeing all these centrists utterly offended at the suggestion that you will have to do any work to get your candidate elected.