Hi Alpha,
how do you feel about psychology? Have you ever talked with a psychologist? I think that could really help you. They can help you learn about boundaries and strategies to manage dynamics with difficult family members. I recommend trying a different path. I think that continuing to keep a list of all the ways your relatives bother you and hoping that they will help and support you may not be the path to peace for you.
I am sorry that you feel so hurt by your family members' actions. Wouldn't it be wonderful if we could all grow up in caring and supportive families? I understand your frustration. I grew up in a very dysfunctional and hurtful family.
I think it helps to remember that people are who they are. We cannot change them even if they are our relatives. Our power is in how we respond to others. Have you thought about perhaps responding to your family differently...various ways to do that...don't see them so often...avoid asking them for help...tell them when you are not okay with something they say/do and then move on.
I think you said that your mother died. I am sorry for your loss

I imagine that was a major trauma for you at a very young age. That is another factor which you could get help with in therapy. I wish you peace.