its been reported that Obama and Joe dont get along in private. Obama has always looked down on Joe. Also Obama refused to endorse him etc. So these two instances stood out to me in that context.

Obamas signature achievement was Obamacare. In the debate Joe said he wants to supplant it with Bidencare. Overwriting Obamas policy namesake.

Also, there was a point where Joe was pressed on not getting anything accomplished in his 8 years as vice president, and Joes respone was to throw Obama under the bus to the effect of 'Ill be president this time'.

All the while obama is now out campaining to save his legacy (and cover for their illegal acts)