Why does the supervisor keep getting mad when customers keep coming into the establishment a hour prior to closing?

Been in a couple times and everyone seemed mad so your not alone

My father owned the Biff Burger and we started cleaning all the machines and the grill an hour before we closed but we always fix fresh food for anyone that came in. If this person is getting mad I would report him that is very poor business management

I don't know only in there around 6 to 8 pm if I'm in there at a hour before closing and treated that way I would contact the owner about it.