I read somewhere that employees of Sly are not allowed to look him in the eye, maybe BS but who knows.
I heard the same about Lou's employees not being allowed to understand him.
I haven't heard that about Sly, tbh. Dolph Lundgren did mention that he was an asshole, accusing him of basically flirting with his wife, Brigitte Nielsen, when Dolph was with Grace Jones at the time and was faithful/committed. Obviously Sly got upset that he couldn't get his wife on lock and was taking it out on the innocent party instead of keeping her in check. I watched the Netflix documentary and just didn't find it particularly interesting in comparison to Arnold's. It didn't seem to gel things together. He did mention about his regrets with his family choices but didn't go anywhere into it as much as Arnold did. I've heard some good things about Arnold, behind the scenes and shitload of bad things about Franco.