For people to listen to your story you've got to listen to theirs and understand the point they are trying to make to you.
The world for the most part is what you make of it. There is a lot to be said for the idea that events and history shape a person but in the end we all have a brain, we can all think and we can all change if we really want to. Fife takes effort, there is no way around it. Everything you work at, study, do etc requires work including family.
While not being a doormat for your family problems, make time for them and don't lose contact with them. You can make friends anytime, but not family. Your sister will sooner or later try again to make peace with you, they always do. If you let the hurt hold onto you and get over it, it'll stop you trowing it back at her the next time you meet.