I just want to do more for my kid siblings
You might be able to... when they get better, & in healthier spot in life, themselves.
They need to, sadly, do their part too, & give you a realistic chance at helping... which they are not doing, if at the time too entrenched in their own issues, the whole atmosphere at home is complicated, you are far from it & trying to get closer is only offsetting you, things don’t work to time & schedule reasons, or anything you would very much try working with, if things were any better. That they, at the current time, aren’t, is not a shortcoming of yours.
and do nothing.
Looking for solutions & acknowledging situations & caring is very much doing something.
Stop with that guilt trippy, situations twisting nonsense.
Judgmental bullshit while people try to help someone else with incredibly painful situation is first not helping, secondly tiring, thirdly quite inhumane.