forget them - the supervisor, and try to improve your work in the line of their comments. my way of dealing with critique is separating myself from the paper am presenting - the critique is about the paper and not me. tho some supervisors can be such idiots - if you have my sup - they make sure they criticise you and not your work. so..... forget them, don't make them so important as to stick in your memory for ages. pick yourself up and address the method you're using. its painful, but you learn as you go along.