Dear lord this is absolutely awful. I want to tell you that you in no way fucked up. It is your parents that are fucking up and failing you. You said that you’re 15 and I want you to realize that 18 will get here much quicker than you think it will. I think you should start planning how you’re going to leave your parents behind and I believe you should consider going low contact or no contact once you leave for college, move out to be on your own. I don’t know if you have a support group such as grandparents or a friend whose family you consider like a second family. But i believe you should reach out to someone if you do have that support. Your parents are extremely toxic towards you and the fact they dump all of this money on your sister but cannot spend $20 on you for hair clips is outrageous. Stay strong u/Birthdaycake32 you can make it!