I Have the Zodiac to Slay Demons

The first comment, how should I put it, after reading 10 pictures, the villain does whatever he wants and kills whoever he wants, while the protagonist is always passive and takes the initiative and lets the villain go (slaying demons and demons is not seen, but demons are seen causing chaos in the world). Later, he has to rescue his girlfriend, send his fiancée to be ravaged by villains at the engagement party, and kill his classmates in order to survive. This book disagrees with my views, so I discard it.