Mental illness is brutal. Luckily my family seems to have escaped it. But policing for 25 years, I saw it up front and it is bad. Some friends too, including a good friend of my wife who killed herself. She was married with 2 young kids. Dreadful.
My friend's mom killed herself a few years back, a few years after a divorce.
I used to be a teacher before doing my current job and talking a student out of doing something harmful to themselves was one of the scariest things I've ever had to do.
I have the utmost sympathy for families and individuals having to handle types of mental illness [whether it be from birth or developed later on in life].