Negative criticism? “I don’t care and you don’t matter. I am better than you because...”
Positive criticism? Smile and graciously say Thank-you. Make it a mental point to remember the good things said and who said them so you can remember a few weeks later when you’re not feeling up to par in a situation.
I posted up some photo shoot pictures I took with my car on a car enthusiast site. 19 guys said “Woo hoo!” and 1 said “I didn’t see any women there, all I saw was a Linebacker”. I just laugh at the one guy who said I was a line-backer, it’s now a running joke with my friends. But I will never forget the two guys who said “I dropped my gum” and the next guy said “Hell, I dropped my teeth”.