I'm sorry but she is the most realistic heroine, she has just arrived in an unknown world but also surreal because coming in a novel, it is therefore completely hard to accept the vision of a world like this one suddenly, Ain almost died before his eyes, the only person to whom she cares and is close in this world. Maybe he's vicious but basically with her, I don't think he hides his feelings that much. In addition to the education that he must have clearly taken him to death, here we have only the father's version, but educating him so hard is not the right solution. So I think the author's goal is that with this extremely loving mom and a cold but far-sighted father, Ain will be able to find a balance. For the moment the 2 parents are both wrong and right, they have two completely opposite visions so it's normal this confrontation. But in my opinion you are all biased because you have read too much history of this unrealistic genre but in itself her reaction is not excessive and rather normal given her history, and the doubt that it has method of education of his father since she knows the result of it which leads to the death of Ain