I hear you, and the debate performance won't change my vote--but it confirms my disappointments. First, in the party, that its leaders didn't listen to voters with reservations about Biden's age and persuade him to step aside; and second, in Biden (and his team), that he hasn't more honestly assessed his abilities to function at the levels demanded of the presidency.
I tend to think that dissent is not disloyalty, and that it is healthy. (I think the Republican Party would be healthier if there were more dissent!)