… is to listen and figure out if there’s really an issue, and if there is one, then try to solve it.
In short, don’t be a snowflake and get hurt by every little thing that someone doesn't like about your work. Take that feedback as a way to identify things that you can improve.
Moreover, a lot of designers think that if they take advise from others, they’re weakening their position as an expert, this couldn’t be further from the truth. You’ll only get better if you learn to take advantage of the feedback that is given to you, especially if the feedback is coming from your client or users.