Chapter Text
You don't have a rich backstory. There is no reasoning behind your logic, nothing we can use to excuse your behaviour. You just seem to be purely evil.
That is, until we examine your actions.
Well, your most memorable physical characteristic is your love of the colour pink and kittens, and you dress accordingly. There is nothing evil about this in anyway, yet it evokes a gut-reaction of disgust in most.
You could argue that some people just despise femininity, and that this is no different, but it's generally accepted that it's the contrast that people loathe, the hypocrisy of it; the smiling puppies and torture, pink ribbons and punishment.
So before your personality was revealed, you were already on bad footing.
Some of your early grievous offences include being rude to Dumbledore as he welcomed you to the school.
Malfoy has been noted for ignoring Dumbledore's speeches too, but he does not get any backlash for it, unsurprisingly.
But that is only the beginning.
Then, you go inspect the other teachers. Bear in mind that this is your job, you are paid to do this. You decide to put two teachers on probation.
One is clearly unqualified for the job, and seems to only have got in based on the fact that her great grandmother was good at the subject. That is not sufficient for you, nor should it be for anyone. You rightly do not understand why you are vilified for this.
The second teacher is a man. He has put his students in dangerous situations, has paid no attention to the curriculum, and some of them have even confided in you, saying that he scares them. He has turned up to class bruised and bloody, and seems to relish in situations when his students are in danger.
Putting him on probation was the sensible option, the reasonable thing to do.
Some vouch for his character, but that's not important. You don't care how good of a person he is, you just want to know can he teach. Perhaps this is a shortcoming in you, but you don't see it that way.
Some one needs to take control of this school, and you think it should be you. You seem to be the only one who can look at things critically, without romanticising the whole affair.