There's nothing worst then being stuck with an A@@hole like that for a long trip. I have flown with guys on company checkrides and 2 week long trips that constatly nitpick and hound you about the tiny things that don't matter.
Then when they fly a leg- its one mistake after another. When you tell them something like- " Hey, we're 3 miles from the runway at 10,000 feet doing 320knots" They say- "I know, I know." or "Damn ATC always screwing me up!!"
its enough to make you old>