It’s also completely impossible. A campaign that could convince two thirds of Biden voters to switch would shatter every record for a grassroots campaign (heck, even a corporate backed campaign) that had ever been set, by orders of magnitude. You are not going to convince a statistically significant number of people to switch their vote, especially not between now and November.
I also feel like you’re missing the part where even if you DID accomplish that, Trump would still win the presidency! If you vote third party you might as well not vote!
Especially given how slim the win margins were in 2020 and 2016, I’m not convinced that Biden will win if we don’t all vote for him. I hate the DNC as much as anyone else does, but if you don’t want a person who openly plans to abuse his Presidential powers to punish his opponents for daring to prosecute him for a crime he committed, you only have one choice.