Well, Kamala Harris disagrees with you, why else has she not resigned from the Senate yet? Even she doesn't believe that dementia ridden Biden would get 81 million votes, beating Obama who didn't manage to match his own record 4 years later. I would never get over this. To me a Biden administration would be a bad joke and a failure for democracy, quite frankly everywhere, not just the US.
No offense but this is a very weak argument. Do you know the history of other Vice Presidents and when they left the positions they held prior to becoming VP? Dan Quayle, the VP under Bush Sr didn't leave the Senate until Jan 1989. Four years later Al Gore did the same thing when he was VP for Clinton. Were both of those elections stolen as well? Those are two bipartisan examples but if you choose to look into it just a little bit you will find many more.
