I'm sorry you had to experience that, I know it's painful but their manifestations are about them, not you. Even though they make it seem like it, it's their insecurities and lack of empathy. Also, when in groups, people automatically give away parts of their responsibilities and even compassion, empathy, all gets reduced so then it's more possible to act disrespectfully towards others. But that doesn't mean that the other (you) deserves it, not at all.
Related to writing about it, I think it's a good idea, just starting maybe to write for yourself, to write it out in a journal. If you haven't already. Just to write out your feelings. Then, if you feel like writing an article on it, you could do that too.