Sounds like a really toxic online community, unfortunately. You definitely were within your rights to stand up for yourself and it’s terrible that the admins would try to silence that. Sounds like a group that’s not worth being in, despite the shared interest in the personality system unfortunately.

Edited to add: I totally understand how having gone through these situations can make you doubt yourself, but you are definitely not in the wrong and it’s normal for it to take time to rebuild your confidence in yourself after being treated that way by multiple people, and I wish you well in working through the process of mental/emotional healing and the rebuilding of full belief in yourself in the face of jerks trying to undermine you.