He has insulted my teaching style (he has said my class isn't joyful, I don't connect with my students, my activities aren't fun) without ever really offering constructive, specific feedback, or for that matter, paying attention to my actual students or classes. I realize this may look to the reader like I'm a bad teacher with sour grapes. It has taken a lot to keep myself from believing that, too. But I can't believe that I'm a bad teacher, because my students respond quite positively, and I'm constantly self-evaluating and adjusting based on classroom needs. When I expressed dissatisfaction with his methods, he literally ignored me.

Very bad crack, it sounds just like how a western DOS at a Chinese training center would behave. Of course, here in Chins you can teach without a degree, or with a forged one, or with the wrong visa, even at a public high school/college/uni. You don't need a TEFL certificate or crap like that either! You'll be treated a whole lot better in the public education sector than in the private sector, as a rule.
I heard that in Morocco, a country of abject poverty, they wipe their asses with one hand, and eat with the other. Also that child beggars have irreversible injuries inflicted on them by their parents to arouse extra sympathy, and thereby encourage alms, from tourists. Is that still the case?