Incompetence is one thing. Being incompetent but thinking you are a genius and know everything better than any expert (or even just competent) adviser is another. Biden would not be Trump, and would not assume everything anybody else did is wrong. Trump fired all his Generals on staff because he knew better than they did. He trusted Putin (and other miscreants) over his entire intelligence community. Biden would not do either of those.

I'm sure Biden's idea of "the best people" to fill appointments would be far different from Trump's purposefully appointed aholes to sabotage agencies and government functions.