I could notice this when I was only hospitalizing in class because I was sitting near the boy. I didn't know how best to respond to the situation. Of course, I didn't like it at all when I heard the not-so-pleasant things he said about the teacher, on the other hand, if I pointed it out right away, I would be basically a "bonzak" and her accomplice from the beginning and I was afraid that he has already defined himself in advance of me. That's why I was silent and preferred to watch his behavior and try to find out what he actually criticizes the most.
Of course, I didn't like it at all when I heard the not-so-pleasant things he said about the teacher, on the other hand, if I pointed it out right away, I would be basically a "bonzak" and her accomplice from the beginning and I was afraid that he has already defined himself in advance of me.