When I have my newborn I want my stepfather to be referred to as Uncle.
Did you stepfather do something to make you want to change how he's referred too?
Once, I went to the store and as soon as I left my stepfather ate my ice cream.
That's a small thing to hold a grudge over.
Dude, he needs to be punished.
While what he did was kind of bad, do you believe that this punishment fits the crime? It seems like you're trying to ruin him for eating some ice cream. You should find a softer punishment, like making him buy you new ice cream.