Tbh I dont really think shes that's spoiled I think shes just hella privileged. Shes aware her greed inevitably lead to a scarce amount of magicians and he brother not being protected. She knows shes Ben wronged by prince kim and even gets offended by how the minister only values her looks.
I think shes lived in a nice little bubble and now its popped shes not throwing a tantrum and is actually trying to readjust without knowing how to do it. And everyone is treating her like shes ignorant when in reality she was just never taught how do prepare for this