The dark spirit magic king wanting her to harm some maid because of a spilled drink is probably why dark spirit users aren't liked; protagonist is the only one who knows what will happen if she acts on his advice. Further, continual antisocial sociopathic training starting at birth all the way through childhood from a malevolent spirit would result in a monster being formed every time. She's forced to live the equivalent of the Shining and Amityville Horror where everyone knows that she's got some poltergeist whispering "The person you're talking to doesn't like you, Claudia. They're afraid of you, Claudia. They'll harm you if you don't harm them first, Claudia." into her mind.