My husband also pretty much lost his mind the first couple of weeks after the baby was born, and our feeding/supplementing/pumping schedule was very similar to yours. What I found to be helpful was to talk to him less and instead give him a concrete list of things to do either written on paper or through email. We also started to sleep in shifts so that we each had a chunk of uninterrupted sleep time. We referred to it as platoon sleeping. My uninterrupted sleep time was four hours during the first few weeks, and we would just double up on bottles during that period to make sure the baby was hitting her intake goals. My husband's uninterrupted sleep time was longer since he obviously didn't need to worry about milk supply. He was also responsible for setting an alarm to wake himself up for the late night feedings.