
Sure he was always a cruel bastard, always will be from the looks of it, but before he let the dogs out so to say, there was still benefit of the doubt, a degree of seperation the audience had to the evil bs he was up to.
Showing us how these kids get their own 4D beastality experience is where that seperation is torn down. No amount of rizz could make Andrim "better", or more like overshadow that straight up unhinged behaviour. Unlike many psychological/horror/thriller MLs out there he doesn't have any big trauma or goal to try and justify that shit either, so it's hitting most readers like a freight train.
On the other hand perhaps that was intentional of the author. Like a "this is what you wished for" kinda deal. Something, something, what you can't fix WILL get worse, some villains aren't worth the sympathy, don't be rizzed into ignorance; take your pick.