Do you realize no matter what you undertake, or create, or accomplish, someone is going to find a reason to criticize it? There is no reason to allow another person’s weaknesses and doubts to infect you.
Understand their negative perspective is their problem, not yours. Certainly, you want to consider their viewpoint for what it can teach you. Yet, there is absolutely no reason for it to distract you.
Beginning today begin to know who you are, what you’re doing, what you know is right, and nothing anyone says can change that. Why? Accept this is your life to live. What others say should not matter.