Then they should dutifully offer another solution. I've already said constructive criticism is different from resistance. Anyone who tries to break down what you believe is the truth without offering any alternatives, by which you can accomplish the goals you feel can be accomplished through your truth, is spending too much time worrying about other people and not enough time worrying about themselves. They are an insecure, negative person, who will eventually succumb to see any form of success as being striped from them, and thus, they are the quintessential example of someone you don't want near and dear to you.