You probably don't think it's as bad as people say. But it really is. Think the North Stand toilets at the Goldstone, but darker. I've not been to anywhere comparably unpleasant. I think the other stands are probably somewhat better, but the Arthur Waite is awful.
Imagine it might be because they're laying on a "special" train back to Selhurst after the game, as previously, and the capacity of the train + busses would struggle to exceed 2,000?