It turns out, that the reason they hate the Heros and think they are monsters in human skin is because the previous heroes abused their cheat skills, made sex slaves out of their women, and killed anyone who tried to stop them, thus betraying the trust of the Kingdom and the royal family.
Spoilers
It turns out, that the reason they hate the Heros and think they are monsters in human skin is because the previous heroes abused their cheat skills, made sex slaves out of their women, and killed anyone who tried to stop them, thus betraying the trust of the Kingdom and the royal family.