Yeah I just looked at novelupdates and it says that the webnovel is in an indefinite hiatus and the light novel is discontinued because of that. It sucks. Hopefully the author locks and continues this work in the forseeable future.
Kinda glad this dude's an actual asshole. He's not doing the overplayed "I was being mean to test you" and he's actually discriminating against slaves.
I always find these characters so stupid. You get rid of the potential threat by... antagonizing them and increase the chances of them becoming what you fear.