The model for slavery in the 19th century wasn’t master - tortured slave. That is ridiculous, the model would be parent - child.
None of the slave abuse jives with the fact that slaves were incredibly expensive. A young strong male would cost $100,000 (adjusted for inflation). How much abusing you going to do to your capital investments? Aetna and NY life would sell life insurance policies on slaves. Now if abuse and killing were common would they do that? Reality doesn't jive with the Hollywood version if slavery.