All they had to do was ban both parties and be done with it. They didn't have to purge my entire gallery, make up reasons to retroactively justify the purge, then give the instigator nothing more than a slap on the wrist.
Moderation isn't hard, and if they wanted to quit there's nothing keeping them there other than what little "status" they gain from being a jannie. It's not like they're being paid.