What if it's pure nonsense, therefore impossible for anyone to understand. Does that mean all criticism is "slop" and nobody's allowed to comment on it?
This is multiple logical fallacies in one comment and definitely a comment I would mark in the "pure nonsense" bin. Not all criticism is slop, but anything ad hominem (personal attacks), argumentum ad populum (appeal to popularity), or argumentum ad verecundiam (appeal to authority) is not useful.