Criticism : Is a compliment when you are doing what you were born to do. All great people get great criticism. Learn to accept and expect that you will receive unjust criticisms for your God's given destiny assignments.
Constructive criticism from those who have your best interests at heart are welcome, but you are not responsible to respond to those who don't. "never make the mistake of arguing with people for whose opinions you have no respect. "
Critics are never problem solvers. My feelings is that the person who says it cannot be done, should not interrupt the one who is doing it.
Don't waste time responding to your critic while doing the right thing, even if you lose you win.
"Being confidence of this very thing, that he which hath begun a good work in you will perform it....