People who make me feel like crap or worse off then when I encountered them consistently are written off and out of my life
Doesn’t matter if its family, nobody is entitled to your attention and suffering and it does nobody any real good for you to succumb to the inevitable dysfunction it creates in your life and relationships and also material conditions.
Work on diagnosing and fixing the problem first, worry about appointing blame later (if at all).
This one is very important. This is one of those helpful rules I’ve actually learned in business environment first before I started applying it in personal life.