I don't know about others but I usually take criticism as an attack on me. Maybe because people don't guide me well on how to improve but rather tell me to let someone else do the improvement for me. All my friends except one of my family members told me to get an artist. But nobody would say "get these books on how to draw, read these tutorials, let me show you how to improve"... It seems they are telling me "You are obviously not good and don't bother on ever improving yourself, just let someone else do the work for you". So anyways I got artists now and it's working out fine "on the whole ".