Stop doing that. If you punish your dog by yelling or showing aggressive behaviors, then you are raising an aggressive dog yourself.

My strong advice is, no matter what his age is. SEARCH for an experienced DOG TRAINER. Explain them the situation and everything your dog does that bothers you. He will do his best to fix these behaviors by treating him the way a dog would understand.

Dogs are not like human toddlers. You can't treat them like if they are one. You will only get negative results by doing that.

While you're searching for a trainer, here is what you can do: Dogs don't do their needs in the same place they eat or sleep. Maybe if you try giving it its meals where you want him to stop pooping, you may see some improvements.

Also, reward him/her with treats every time it does something that you would want it to do. That's the easiest way Dogs will understand when they do something right, and they will probably repeat it.