@saudagarbeta
Yeah for the purpose of story writing it's very important to have multidimensional villains. It's very tiresome and unrealistic to keep reading stuff with pure evil antagonists, usually it feels like the author can't think of any other way to portray their protagonist as the 'good guy' unless the one they're killing has a hobby of raping puppies just because he gets turned on by their painful yelping.
That's not to say that 'pure evil' antagonists should never be written, just use them sparingly and never have them be the main one.
If a story contains nothing but these cliche, one-dimensional antagonists, both the world and protagonists lose depth as well. The world will be black and white, the protagonist will never question the world or his actions because everything is already unambiguously set up to make him the 'good guy'.
Even the reader is just along for the ride, you're not meant to think about what's right or wrong, what's moral or immoral, because they author has already decided this for you by presenting one side which never does any wrong and one which only does harm for no reason other than greed/power/pleasure.
Sorry, been trying to read too many manhua's recently, my frustration seems to have reached a breaking point.
EDIT: Oh, and this manga is great. The MC especially is really well written, side characters still need some more development and depth but it feels like that's coming up. And speaking of villains, Alice struck a great balance of 'being actually sort of evil' and 'having a clear goal you can sympathize with' without it feeling too forced.