He downvoted you because your thread is bad, you downvoted him back because you are a spoiled brat who can't accept that people disagree with you. Also, how is downvoting THREE of his thread vs ONE of yours fair? You have more steem power than him so even ONE downvote would have harmed him more than he "harmed" you, but you weren't satisfied with that so you decided to downvote him THREE TIMES, and your acussations of @thatanimesnob having multiple accounts has no logic behind.