Without going ott, art is subjective, what one may see, others may and often are very blind to. I have run a successful gallery now for over 30. I have experience both positive and negative comments about artists work. At the end of the day, it's down to you. If you thought the work was excellent fine, if you didn't, then ask questions of yourself. If someone else couldn't appreciate it or didn't care for your type of Art, so be it. Don't behave like a child who expects people in the Art world to drop at your feet, because you produced a piece and sing praise. At the end of the day, you should actually learn to appreciate people's honesty, because, you should have realised by this stage in your life my friend, you need to find the happiness in your work, and not crave for others recognition all the time from others. however the reasoning for that could be another very long story.