The instance seems to be mostly right wing trolls. I know defederating is unpopular but I don't think much is to be lost in this case and it can save the mods some headaches.
Edit: the response on exploding-heads.com to my reporting of transphobia. Courtesy of the "second in command"
I don't have a problem with you personally. You've been fairly reasonable in our interactions. But the people on your server are not great. Maybe you should make an account here.
I don't care for them myself, but unless they're causing problems outside for everyone else, why defederate?
If there are communities you don't want to see, you can block them as they appear.
How do you block them? Not a feature on kbin yet as far as I know.