I don't know how much 'anger' this is. There's relief to be had, but... that sort of frustration of wishing it hadn't happened in the first place.
My brother has always had issues. And for the most part, they've always been targeted at me. Not the run-of-the-mill resentment at an older sibling, either. Mental health issues do run on my mother's side of the family, but my father is of the 'you can pray it away' school of thought.
My brother, on the other hand, has, since he was about 18... 'self-medicated.' This year, he's kept himself on a steady stream of weed, kratom, acid, and Robitussin. What money he does make goes entirely to that.
I had to cut off contact last year. His episodes began getting more frequent and worse. He's had multiple ER visits and 2 week+ stays in psychiatric care. In between these were long, convoluted messages he'd send to me essentially blaming me and threatening my life (thankfully, I live across the country, but this is a large part of why I had to get my cat... I was afraid he'd take it out on her).
My parents have talked about forcing him to get some sort of actual treatment. During one of his extended stays, he was diagnosed as schizoaffective. He needs to be on medication and in therapy. But they've kept this 'well, if he actually harms one of us...' (I have always been the primary target; he attacked me numerous times throughout our childhood.)
Tonight, apparently, after taking a fair amount of acid... he stopped being able to discern between reality and television, attacked our father, and then the EMTs/cops when they were called. My mother has been messaging me because she can't sleep, she's so wound up over it. But she's finally decided to seek out court orders for treatment.
I'm upset it's taken them this long, but I'm relieved it's finally happening.