Today I called our German teacher "大姐" because I was using my iPad as an e-textbook. She accused me of playing with the iPad and threatened to kick me out of the classroom if I continued. She used to make me wash cloths and clean the blackboard every German class. Even when I had my period and asked a male classmate for help, she still gave me a disapproving look as if I should be doing the chores. Honestly, I felt bad after scolding her, but I don't think I did anything wrong. I feel awful for disliking her so much, but I just can't bring myself to treat her nicely. I also worry that my actions show disrespect towards a teacher, which goes against virtues. I'm not seeking support, just struggling.