Biden thinks in his mind that he's continuing Obama's legacy. I mean look at how he's hired so many Obama-era fuckups in his administration, Podesta being the latest.
But even Obama said "Don't underestimate Joe's ability to fuck things up." This is probably why it took Obama so long to endorse Biden when he declared his intention to run. If Obama got anything right, it was that he knew how bad Biden would screw everything up. He was right about that, and is probably embarrassed as hell over his ex-VP's piss-poor performance.
You can bet that at future meetings of powerful Democrats, Biden will be the one standing over in the corner by himself, being ignored and shaking hands with the air.