There were a few teachers who just did not like me because of my face. Once I was told to stand in the corner until I cheered up. The attitude was 'Oh for God's sake what's the matter with him?' But it's just a natural expression.
Psychotherapy theory turns it all on you: you are the one who is wrong. If a kid is having trouble or is discouraged the problem is not just inside the kid it's also in the system the society.