Professor Teaching Ratings at American U

I was curious as to why professor ratings are middling-to-low at American. I’m referring to ratings on Princeton Review, Niche and Unigo in categories such as: being interesting, engaging, approachable, accessible, and effort.

Specifically, I was hoping that professors might be better in their more popular schools like Communications and International Service, and it was more of a symptom of not being as strong across all majors.