In fact, this situation is often encountered in school dormitories. Many times, we just choose to turn a deaf ear to things outside the window and concentrate on being ourselves. But in the end, you may find that things are often not what you think, because more people will ignore your feelings, and they often live a casual life, so even if you don't cause any trouble to the dormitory, they will continue to live a chic life. I think it is necessary to think that this very bad situation has damaged the rights and interests of the dormitory.
I have a roommate who often likes to stay up late in the dormitory. You said she would stay up late and mind her own business, but I don't know why she is always noisy and disgusting, because everyone should go to bed, not that we should go to bed early or anything. It's really that she moves around from morning till night when she finally wants to sleep. The sound is super loud and makes people angry. I tried to persuade her several times, sometimes with a strong tone, but she just felt that this person was really thick-skinned, and he always refused to listen. Later, the dormitory collective reflected this situation to her, and generally let her learn to respect other people's lives. Anyway, everyone treated her badly, and then she got better. Although she still stayed up late, at least she was less active and would pay more attention.
I think, for this stubborn roommate, what kind of good attitude is really needed, and the key is to deal with the problem seriously and in time.