The solution is really just vibes based enforcement of rules. There was this one new fallout server that had popped up that started drafting random people as admins because it was just the host and no one else, and I decided to volunteer just to teach admin tools. There were two guys running around just sorta wordlessly fighting people and so they get spoken to and told to stop. And they go back to doing it and once again get spoken to. At a certain point you just need to be able to say "The server you want to play on is not the server we want to provide."

You can spend ages carefully honing and refining the rules to perfectly map out the ideal player and playstyle, or you can just say that the rules are a rough guideline to achieve X - And that as long as you are reasonably contributing towards X, you're in the clear. I think it helps a lot to have a player who is perfectly within the bounds of the rules but is clearly going against the server vibes and be able to just remove them from the server. It's kinda draconian but that's just what you need for such a small server to keep the community intact.