People like to think they pay better attention than they do to be fair. I once had some guy get on my case for not using battle voice on cooldown for trash pulls in a dungeon. He was a total jerk about it, but he was right, so i fixed it immediately, but he continued to whine and moan and made some snarky comment on the final boss about how id "finally done it once." Stuck in my head as one of the nastiest people I've encountered in this game - a rarity, thankfully.
Anyway some people are jerks and like to fixate on stupid things to be jerks about. Id fully believe it of someone picked "this guy isnt shuffling back and forth enough" to be The Thing for them.