Don't even think of taking it personally. Frightened, insecure people grasp at opportunities to put other people down and celebrate their mistakes, while confident people recognize how fallible we all are and also how difficult it can be to read minds and know things without ever being told. The best thing to do with the hostile ones is to say "thank you for pointing out my mistake." It's a nice, honest sentiment and they can't keep after you when you haven't justified your mistake.
Your set is stunning.