You I think, are misunderstanding God's law.
He does not hurt you, he gives you a conscious and reasoning. You already know right from wrong. When you do it anyway, you harm yourself.
Fear of God could be similar to the fear you have of pressing your hand on a hot burner. You know it is hot, and not intended for this purpose, and you know what will happen.
If you choose not to you are respecting God out of a healthy fear for what may happen, when you don't, you will get burned.
Fear is not always the same as being scared.