I'd show him exactly what he needs to do,how and why.And if he has never fed the baby in the daytime do it then so he is properly with it,and leave him to do a run of feeds so he can practice.
He should be able to work it out but to be charitable and assume there is an element of can't not just won't,I would make sure he knows.And hard though it is to believe if he has only experienced breastfeeding as a Dad he may not fully realise the risks of dirty bottles and having-stood-around milk.
I breastfed,and faced as a gran with a small baby needing a bottle feed prepared in the middle of the night there would be a learning curve...
(I have some common sense so would make sure I had worked it out before I fed the baby though!)
If he's being deliberately incompetent then none of that will work of course.