I have been a witness of abusive relationships. In which both parties ( victim and abuser ) where feeding the relationship.
I have tried helping. I have tried countless times speaking up to both parties together and individually.
After years of the same pattern going over and over, nothing changed. Only I was exhausted and frustrated, and sad.
For a change to happen, it has to come from them. Not you.
There are situations you cannot change. You are not responsible.
The only thing you can do is detach from the situation. Focus on the good things in your life.
You cannot save everyone.
You can try but if the person in trouble does not want to see, you cannot see for them.
You have to move on. You have to save yourself and take care of yourself.