Feedback can improve you both personally and professionally. Feedback is not about getting praise. You should learn to listen, digest and evolve if there is any negative criticism regarding your activities.
Getting feedback about your tasks can be a regular process for improving your strategies at work. The feedback should not come from a position higher or superior to you. It may come from your peers, colleagues or the customers with whom you are dealing. The intentions are simply to make you work in an efficient manner and not to demoralize you. Try to accept the feedback and never feel that giving feedback is not fair. Make the feedback provider understand that you have listened to his feedback with full attention and will definitely work on it.