just behave
ignore your sister and brother
and your parents, when needed
that's what I do
Seriously this, it's so ridiculously easy to avoid all of this!
I never understood how people had so many issues with simply tolerating their family.
Your brother picks on you? Okay, tell your parents. If they do nothing, call them out on it, calmly, don't start screaming your head off and expect an answer that's not exactly the same. Your sister butt in all of your conversations? Ignore her. Your mother and father don't seem all that bad, but you stated they have their own things that you didn't wish to discuss, well my parents did drugs, it's very difficult to see your father start freaking out hallucinating bees are swarming him and do nothing(if he went to jail, we were moving into a shelter as he was our provider and interventions didn't work), yet I still loved him just the same and wish he was still here today (cancer). So instead of whining about everything do things in a calm manner, get your point across and make things change.