Did you escalate? I would not have left prior to seeing the most head honcho responsible for that Skyclub that was there that day, and noting the precise names of the people you were dealing with. That whole thing is just completely ridiculous and uncalled for.
I've been a WorldClub member for about 3 years now, and the only thing even mildly approaching a not entirely pleasant experience with the lounge staff at NW, CO or DL lounges was recently getting the 3rd degree on using the lounge in LAX upon arrival (wanted to check it out and see if I should worry about arriving TOO early on the way back). But even there I was let in in short order.
I think it's especially important when you encounter bad apples to make sure those apples get flagged.