hypercriticism

noun

1. (countable, uncountable)Excessive or unfairly harsh criticism.

   “Near-synonyms: (quibbling type) cavillation, cavilling, nitpicking, nitpickery, pettifogging, pettifoggery, hairsplitting, hair-splittery, splitting hairs; (demolishing type) excoriation, excoriating, bashing, trashing”

   “Alfred pulled a face as of one that drinketh verjuice unawares; but let it pass: hypercriticism was not his cue just then.”