The best way to handle abuse is to not let it control you do not let haphazard emotions run free forced by what's happening. It's to choose how you want to feel and if you can't then slowly and deliberately undo and control your reactions. Stop having ur thoughts run everywhere and only focus on one thing one goal and achieve it. Your first job is to not care what happens to you, remove frustration out of the equation. No what ifs like how hard ur life's gonna be without a leg or what if you die you don't want to die, BEFORE you figure out how to not be emotioanlly affected. You don't care. It doesn't help you now. Your goal is in the now. Question and understand what's happening. No reacting. Just perception and analysis. Then what you should do is figure out how to react, what will happen if you react in certain ways, and what is the desirable way with the desirable outcome. That's the psychopathic mindset. It's why they are immune to trauma. My whole deal was to figure out how to not be tortured mentally no matter what happens to me.
Also arrogance/delusions. If you believe urself to be stronger than the abuse unqestionably. To be able to face anything and everything of the most severe. If you ask for it and laugh at it, if you see yourself doing it and overcoming it. It doesn't scare you anymore. Because you win even if it kills you, if you believe in yourself.