The world will give your child plenty of negative feedback. It is so tricky, and most adults have not mastered, the art of separating the wheat from the chaff of this feedback. How do we distinguish:
Valuable insights from which we can grow and impove
Irrelevant opinions, which are more about the critic's own preferences or style
Incorrect, or worse, bad intentions on the part of the critic
Rather than jumping to dismiss anything that makes your child feel bad, first listen to their feelings of hurt and disappointment. Offer connection and Staylistening to help them dispel the very hard feelings that come form social criticism.
When they're ready, ask for their own thoughts and evaluation. Do they even agree? if so with that parts? Is there anything useful there? are there parts they don't agree with? why might the person have that opinion? what steps might they want to take?
Helping your child not being stopped by criticism, failire, or disappointment is an enormous life skill.