The bathroom thing was just so stupid.

It contradicts the lore of the books.

The entrance to the Chamber of Secrets was literally built in a bathroom. She could have just said it was a Roman style bathroom that was later retrofitted to be modern.

And Dumbledore let's Harry know about the Room of Requirements by telling a story about how he once needed a chamberpot. A magic chamberpot? Sure. Makes more sense than shitting himself.