Why does charlie say he hates miss kinnain more than anyone before?

Charlie expresses his hatred for Miss Kinnian more than anyone else due to a combination of frustration and a sense of betrayal. He feels that despite her good intentions, she represents a reminder of his past struggles and limitations. As he undergoes his transformation, his feelings intensify because he perceives her as a symbol of the obstacles he has overcome, leading to a complicated mix of resentment and disappointment.