Its low for a man to criticize his own audience, even when he's right about at least half of them. On the other hand, everything he listed on the tweets can, in fact be legitimate criticism. Sometimes a plot hole is a plot hole, a cliche a cliche and a cliffhanger a cliffhanger.
I'm not sure he's criticizing his audience, he's criticizing the ones who aren't his audience but insist on crapping everywhere his work comes up.