Ok so I got my dog when he was about 2 months old, he is now a little over a year old. We neutered him about a month ago as well. He is a very aggressive/violent dog but he also whines a lot. I've followed all the vet's instructions and there is still no result. I'm really confused on how to deal with this. I need help ASAP!

What kind of dog is he? Some breeds are more aggressive than others.

The combination of behaviors suggests a high level of anxiety. Quite often anxious dogs are either separated from their pack too long on a daily basis or they aren't sure of their place/duties within it. Have you considered obedience classes?

What breed is your dog? Do you kennel your dog? If so, how long is he kenneled on a daily basis? How often is your dog walked? Do you have other pets?