1. All the stuff that is making your life so hard in scn? None of this is going to change. You will never be given the chance to make things better for you or for other SO members. A decade later people will still be leaving the SO and Co$ because of the same systemic problems. There is absolutely nothing that you can do about it, stop fooling yourself.
2. Just treat your mother as if she was a Hubbard-style SP. Disconnect from her, stop caring about her, ignore all the phone calls and letters. You barely talk nowadays anyway. Trust me, it will be the best decision you can make.
3. As ugly as it sounds: The guys you care about in your team will suffer either way and there is no possibility of avoiding that. Everyone needs to make their own choices and you should not blame yourself for what is going to happen to them after you defect. It is the cult that will add to their misery, not you.
4. You can make it out there in the world of big business. There might be moments when times will be hard, but nothing will be as hard as what you are going through in the SO. You will NOT be washing dishes or flipping burgers for the rest of your life. Even driving a city bus will be a better, calmer and more sensible job than being in SO management. You can safely go and get a university level education, you have it in you. Get a real job. Stick to your plans.
5. There are family members that will help you once you leave, you will get more help than you ever imagined. Those old clan bonds are far stronger than you think. Do not think you need a lot of emotional closeness and ARC for it. It is not about affinity, but about duty. Put your faith in their sense of duty and you will never be disappointed.
6. Take your significant other, explain the situation and suggest you leave together. Even if it fails, at least you will know that you did your best.