The best advice I can give, and did to this young fellow, is that in this occupation, you have to have a tough skin. That goes for any artist with any medium. Music, painting, literature, food, dance, it doesn't matter. There are always going to be people like that. And that is ok. Because those people are the minority, and their opinion really does not matter. What matters, is whether the artist, that is, you, believe in your work. If so, then it is worth sharing with the world.