Yep, critique is very necessary for progress. If someone tries to break you down with deliberate negative comments, then turn your back on that person. Always look for someone who builds you up. Even with an apprentice bricklayer, the Master Bricklayer has to break out a few bricks that are not quite in line, in order to show the faults, and then show how to produce a beautifully finished building.Bad critique comes from people who break you down but do not know, or have the knowledge, how to pick you up again.