You make it sound like he's doing it on purpose, rather than just being woefully incompetent.
I'm not going to say whether or not his wife should get abuse, but why does it matter whether he's incompetent or if he meant it? He still did it, so he's a c***. What if a doctor killed your mate, would it be okay if it turned out he didn't mean to, he was just a s*** doctor?
That would be murder