The guy that manages Kbin has been having personal issues and stepped away from the fediverse so yeah Kbin is kind of in limbo at the moment and indeed not well moderated. There's mods but there's just so much they can do. The software doesn't federate the deletions so even if they're gone on Kbin, they remain everywhere else.
One of the main problems is that Ernest is the owner and only mod on those magazines getting all the spam. I guess I missed the memo (figuratively speaking) about deletions not being federated though. That seems like a problem even if there were alternative moderators.
There's at least one person on the mod-request queue for most of the spam-ridden magazines. That "at least one" is me, which is how I know. I'm not here all the time and wouldn't be great at it, but at this stage even a part-time mod would be better than none at all. Hopefully, as and when Ernest comes back he can assign some roles. Twice as hopefully, someone else who would be better at it gets it instead.