All violent acts, lies ever told, confrontations or wars ever waged are directs attack on free will. They are attempts in bypassing someone's free will, making him do whatever the abuser wants instead of what that person considers to be the best action to take at the moment for his own well being.
This is why often victim of abuse are so dysfunctional and they have major deficiencies in their lives even after the abuse stops.
The purpose of free will is to facilitate self preservation and self correct when mistakes are made. Free will is what allows you to take better decisions when information about your potential flows or mistakes is presented to you. Long term victims of abuse tend to be trapped in a vicious cycle, because as a result of the abuse you often end up with confusion they become dysfunctional and self-sabotaging.
Which makes them believe that free will is something dangerous, if they are already so dysfunctional when they are trying to control and manage themselves if they would just allow themselves to do whatever they want when they want their lives must completely spiral out of control.
This is of course an error in those people perception, because free will is an insurance for self preservation it is what allows us to be so good at taking care of ourselves and everybody around us. What is causing the dysfunctionalities is the lyes that created the confusion.
If the purpose of abuse is to bypass free will, healing from abuse is to restore the ability to have free will. Which is what is going to allow that person to become functional again. The mind gets poisoned with lies, in order to restore the health of the mind you have to find out the truth. The best advice I can give you if you are suffering from mental illness is to learn how to think critically.
There is also a darker side of this problem, if you consider free will as being dangerous and destructive and you don't trust yourself to do what you want. You will also consider others people free will dangerous which could make you act in such a way to don't allow it in the people you have power over. Which is going to perpetuate the cycle of abuse, where victim of abuse left untreated eventually become the abusers.
This will affect the quality of your life and your relationships, people who are not used with abusive people won't tolerate it so the only people that will stay around you are victim from past abuse that haven't healed. In order to be around other free people you have to free yourself from your mind prison first.
This will also lead you to have deficiencies because you stifle the very own mechanism that is supposed to allow you to practice self preservation and when you have scarcity you are more likely to cheat so your integrity will be affected as well.