The Lecturer is brutal. the "Umm" rate in his talks is inexcusable for a professional public speaker, which is what I classify any "teacher" as. Makes the lectures impossible for me to listen to.
I'd take a trained speaker–even an actor who doesn't actually know the material he/she's describing–as a primary lecturer any day, as long as I get access to someone who knows what they're talking about in a recitation.
If you can't listen to it - maybe that says more about you than him?
How is that a meaningless criticism?
For lecturers the ability to present in an engaging manner is at least as important as understanding the subject.