Just be thankful you only have to put up with this guy for a month. I flew in the right seat with a Capt. like this for 2 yrs. Most horrible 2 yrs of my flying career-Always had something to say no matter what-People like this are control freaks and will never change. I would take the advice of the peers in your industry (airline) and talk to your flight standards dept.
I wish I would have had this option. Good luck !!