The fact that they didn’t use “moral relativism” explicitly suggests to me that like most general philosophy classes, they are probably moral realists and the OP is just being cheeky about it, or legitimately for some reason completely unable to present moral realism as a subject of discussion.

I don’t agree with your characterization of moral universalism here, but regardless it’s clear that they are either bad at their job or posting for the memes because it’s literally their job to be able to establish what a cohesive view would be and why that is important, so it’s weird to act like clowning on their students for having a selfcontradictory view is anything but an admission of failure on their end.