Just watched the video.
First off: Janet, her ****ing impact.

Second, the metallic robe wasn't flattering on her. Robes in general don't compliment anyone trying to dance. Third, she... really isn't fierce like that. She wasn't serving IT like she seemed to think she was.
Overall it was a pretty average video, and that's fine. Not all videos are designed to be works of art. Some are meant to sell the song and this video does that.