This kind of characters is one of the things that makes good storytelling and character development, nothing in this world is completely dark and/or light, grey areas is what make things interesting in the stories and in this one in particular, hero or villain sometimes depend on the reader/author perspective. Plenty of times we don't have to agree (morally or other reason(s)) to every action and reaction, but if the author give enough depth in the story/plot we can always understand the reasons behind those actions and even achieve some level of empathy or sympathy we didn't had before with less information.
Loved this last update btw, it was already tier A game for me but the complete prologue+chapter 1 (I guess the chapter is finished right?) was enough to me for this game enter my favorite AVN list in this site, enough content and quality overall. Kudos NiiChan, keep up the good work