Very well said, @chbartist! We just have to accept that in life, no matter what we do, people have something to say.

If they appreciate you and what you do, great! If they are criticizing in a CONSTRUCTIVE way, then that's great as well as it leaves you a room to improve and grow.

However, if they criticize just to destroy you or project their frustrations on you, they aren't worth your precious time. So, smile and carry on - that's absolutely the best thing to do.