Ultimately rules like that DO make sense - Spamming 203's on hosp is a huge advantage and its a poorly designed map to have allowed that to be possible. - and you broke the server rule. If you have an issue or claim you didnt see the rule...then go complain on their ts or forums and say sorry i didnt see the rule. Easy as that.
There are "rules" that make sense and rules that dont. And certainly too many power happy kids with admin rights. They have no power or authority in real life so it goes to their head.
It simply eats at the clans reputation and so be it. IF a clan allows stupid admins and stupid rules not much you can do other than go to a diff server or get your own. And post about it and spread the word that they are a bunch of tools.
SF Hospital isn't poorly designed, it's just the equipment setting that isn't really coherent, in the end. I think the original choice developers made was to take nades off of the equipment for a good reason (that's an hospital, engagement rules wouldn't allow you to use those in such an area), but 203's are still available, and they can be used both outside and inside, so there's no real respect for rules of engagement (aside of the spam abuse itself).
About admins, just meh. I think it just shows the average players we got to play with these days. I'd rather see a few official servers administered by more mature people indeed, than plenty of those clan servers. It would be a lot easier for server updating and management too (rather than having dozens of different clans servers that behaves in every different way possible).