partner ruining baby's routine😡

I have said time after time after time that we need to try and get our baby into a routine. I try and get him settled for 8pm and down for a sleep, my partner works backshift so he doesn't finish work till 10pm but when he comes in he talks really loud even though i tell him to be quiet and then our baby wakes up and he goes and stimulates him. It's annoying because i have been stressing all day trying to cope with a colicky baby and my partner is ruining it. I have said too many times to quit it and he ain't, how do i explain to him that it's important for him to stay sleepy at night😕