How can I improve my family life ? Please help me?

Wow it's horrible to feel this way, but I know your parents don't think your a waste. I know that they still love you. You should try talking to them about this describe how you feel. Or if it's to hard to say in person write a letter to them. I'm sure that they will ure you this isn't how they feel. But you can't take it from me you need to ask them about it. Maybe also organizing something to do as a family. You could do something you all like to bring you closer. As for your ADHD and Anger problems you should talk to a consuler or social worker. They will help you a lot. Good Luck