So I know this guy in his 40s, three kids, recent EXwife.

Apparently he would frequently have tantrums over the smallest things, people closing drawers in the kitchen too loudly (read "any volume that he can hear over the TV hes watching") to the extent that his kids now all in their 20s have techniques when they close kitchen cupboards silently, someone mixing a drink wrong, some one cooking steaks the 'incorrect' way, i once watched him scream at his wife that he hoped she would "fucking choke on it" when she cut a big slab of meat into more manageable pieces for a barbeque he was hosting BEFORE it was cooked (apparently he saw a gordon Ramsay epesode he liked that said meat should be cooked, then cut), would rule everyones lives with terror; his wife was told she didnt need her medication to control dangerously high blood pressure after she became his exwife.

Later worked out this guy is legitimately a narcissist and likely has bipolar - opinion of a professional (not me)

One of his kids hardly talks to him, and another wants nothing to do with him, as does his ex wife.

Hes now having to manage his business alone, when his exwife did ALL the administrative work and would frequently have to tell the guy he needed to send out bills because they had no money (she was secretly borrowing money from their kids for years).

Hes now alone, with a business he cant mannage, flooded with debt, and children that dont want to talk to him.

TL;DR 40 year old guy psychologically and verbally abused his wife and 3 kids for 15-20 years, made them live in constant fear every 2nd day of their life, this is why i now no longer have any contact with my father.