In the book Miss Trunchbull picks a small girl (Amanda Thripp! God, I loved that book) up by the pigtails and hammer throws her clear across the playground because she hates small girls with pigtails just that fucking much, and if you didn't find that terrifyingly awesome when you were seven I don't know what to tell you. Also, she wasn't shamed out of teaching g because she was big and strong, she was chased out because she was a violent fraudster who had cheated Matilda's teacher of her inheritance, her home, and her wages. God, it's like OP doesn't even Matilda if she can't get that much right, and what the fuck kind of weirdo kid reads Matilda and wants to be one of the adults, anyway?
I suppose I should apologise to Ms Triggered of Tumblr for reading Matilda so many times as a prepubscent shitlord that I basically still have it off by heart 25 years later now?