I work 84 in two weeks as well, I choose to not take overtime, instead I get 4 hours of comp time per period, I do that because of the idiosyncrasies of GS overtime pay.
Have you spoken to him about it, or is he just kind of a tool and does not care about his employees productivity and happiness.
No one will ever convince me that 4-10's are not more productive, just like trop hours, especially in an office environment, but it holds true for good employees that work remotely too.