Well, I don't have a solution for your actual question about being banned, but I can offer an interpretation of your issue and my own opinion, which echoes some of what Maeve commented. I suspect that you're young, which I know makes it feel that you "need" something like a reddit community. I could be wrong about that, but in either case, you don't. I was the victim of a covert narc mother and enabler father and am now estranged from both. My partner had an abusive malignant narc father. We both used to frequent those communities for a time, but as we/I got older, I realized they're really not that helpful. The validation of your feelings and experience certainly has some level of value, but it's minimal, and stops once you're aware of the simple fact that you aren't alone. Then it becomes a place to wallow in sorrow rather than try to actually deal with the situation (whether mental or physical) and develop strategies to solve issues. Once I saw that, it's far better to focus on how to move forward, emotionally or otherwise. I would suggest leaving reddit permanently, primarily because it's terrible for mental health due to it being an echo-chamber by design. It reinforces feelings of helplessness over the long term. In my view those communities should only be used as a reference, and not something to really be a 'part' of. Functionally all they do is enable your suffering to remain present in your life rather than acting as a healthy off-ramp.

Instead, what I did was educate myself on the clinical, scientific and psychological aspects of narcissism and read technical blogs, websites, and academic papers by legitimate researchers about the subject. Not YouTube. It's infinitely better because it provided me technical tools and ways of thinking to improve myself and heal and respond to abusers, rather than fragments regurgitated by random reddit users. Understanding the real reasons why narcissists (or people with similar disorders) act the way they do is enormously helpful and uplifting, because you then can understand yourself and your pain, and it frees you from needing online validation because you know why things are the way they are, and how to react to future occurrences. And then you can take control of yourself and of your suffering and start to heal. But for me at least, those communities were like water-logged loose band-aids; they helped in the very small short term, but they quickly fell off, so then the solution is to walk to the hospital and get a permanent solution. And in this context that's to learn and grow on your own. That's not to say communities don't have any value, they do (I'm here aren't I?), but reddit's popularity and ease of access means it's quality is bottom of the barrel, and it's often much more damaging than helpful.

TLDR: go elsewhere, preferably a library.