IMHO, one of hardest thing for a parent is to think their children have opinions of their own and that these might be right. At least right for the child.
You are in your first apartment, therefore have just flown the nest and you parents have not accepted that you are an adult.
You like posts at the corner of you bed, stop in to your local lumber yarn or building supply mega store and buy a post, put it on a base and place it next to the bed. You might also be able to find a coat rack at the local thrift store and use this.
Don't let your father get on your nerves, accept the bed and then adapt it to do what you want.