What gave you the impression that it was going to be nice? Was it the 'sold into slavery' part? Or the 'cruel and sadistic nature' part? Did you even check the description? Or the title? Or look at the cover art? Did you just close your eyes and pick a title at random and assume it was going to be 'nice'? Maybe actually look into what you're about to read first instead of diving in blind and then complaining about it.

I feel sick