Why do i enjoy doing bad things? am i a sick person?

You don't enjoy it. You are just lashing out at the world and everyone before they do it to you. You can control your actions, but to do that you have to recognise your inner anger. You seem to be lashing out and taking your own anger out on others. What is it that you are really angry about? Stop blaming everyone and look at yourself. Why do you feel that way? What can you do to make things better?