The documentary "Bright Lights, Dark Shadows" goes into better detail into the complex (and often just terrible) person he was.
It's from "Bright Lights and Dark Shadows" where his son says that he was great to other people, but not much so to his family.
From what I get he was a bit of a Jeckle and Hide guy. Both ruthless and kind to a fault, sounds like a bipolar guy if you ask me, of course that wasnt a term back then.
From what I have heard, with his entourage and the impression upon meeting people he was a nice spend money sort of guy, but every interview I have ever read or seen that was his family said he was an ******* and treated people very badly. His wife also readily said the he would slap her around quite often if he got angry with her. And his kids also said he was a very poor father and was never really there for them.
You have to keep in mind that back in Robinson's time, as a kid if you talked in class the teacher or principal whipped you good, you go home your old man whipped you even harder and you often saw your mom beaten up by Daddy if the supper wasn't quite right. Not to excuse guys like Sugar Ray or the much worse reprobate Jake Lamotta but you kids have no idea what it was like back then. Corporal punishment for very small infractions were the norm rather than the exception. A close friend of mine back in the early 60's failed grade six and the principal beat on him real bad. His left eye was black and swollen up for about two weeks. Noone, no parent or school official said or did a thing. I'm sure things were much tougher for the sugarman in his youth. Don't be so quick to judge young man, unless you know.