How bad can a bad guy be?

I study in a town in high school. In the third year of high school, there was a girl H, who didn't like to talk. She was a native girl, studied hard and got good grades. Then, in the next semester of senior three, when the review was the most tense, H's roommate suddenly reported to the teacher that H was under great pressure to study and had mental problems. Because our teacher at that time was still young, and another girl was crazy because of the pressure of the last college entrance examination, the teacher was frightened, so she called H's parents and took her home. H's parents are the kind of people who have never studied at all, and they don't know whether they should take H to see a doctor or negotiate with the school, so they keep H at home for about 3 months. Then one day, one of H's roommates, L, came to my dormitory to chat. She proudly told us that there was nothing wrong with H, but a little conflict with her, so together with several other students in the dormitory, she told the teacher that H was mentally ill because of the pressure of study and drove H home. It was on that day that I learned that H's parents were farmers, in poor health and very old. H had a brother who died unexpectedly. Since then, H's parents have neither worked nor farmed, but only led the subsistence allowances to play mahjong. I may not care much about H. I told her that if I didn't get into college, I would go home to farm and get married, which is why H is so quiet and study hard. L The reason why they dare to bully H so unscrupulously is because they think her family is poor and her parents are farmers. If they don't take her to the doctor, they won't find that H has nothing. Later, when H came back, his study plummeted. Then she failed in the college entrance examination, and then I never saw her again. My teacher at that time was a very naive (stupid) teacher. The so-called investigation is to ask H's friends and roommates something. At that time, roommates colluded (threatened? ) lied to her good friend, and they were a small group in school bullying, and no one in the class dared to provoke them or tell the truth. In fact, I feel very guilty about this matter and feel that my blindness is also an accomplice to H's tragedy. Perhaps the hottest place in hell is reserved for those who watch and stand by. Later, I was also malicious by my roommate, and I always thought it was my reward for looking at H coldly.