Consider the following situation.
Suppose a cosmic being sets up the initial conditions and/or laws of a deterministic world so that your entire life is predetermined. The being knows exactly what you will do, before you do it, before you are born, and sets everything up so that you do exactly that. The being could be God, but need not be divine. A very powerful alien or computer would suffice.
Consider further: the being could even tell you he designed your life story. He could say “I defined every detail of your life! There’s nothing you can do that I didn’t predict.” The being could write down, on a card, a prediction of what you will do, every five minutes, and then, after five minutes go by, show you the card. And the being would always be right. Each and every card would perfectly predict your life story. The being could even write all of them before you are born. This could really aggravate you, and there would be nothing you could do to stop him.
To me, the above could not be more violent to free will.