The idea of feedback is to know what people see from their side of you and your work. While feedback is sometimes comes in the wrappings of rejection, it is nothing more than feedback.
Whether you are in art licensing or another creative industry receiving honest constructive feedback is an education for free.
Using myself as an example, I have been toying with logos and colors and other website and online matters publicly and the feedback is great.
It helps you learn your audience, the taste of others and how well you are representing yourself.
So if you are getting "feedback" it's a good thing even if the feedback isn't what you would like to hear.
Create a creative mindset and be certain to listen to all of it, use what you can and move on.
ART LICENSING FROM my PERSPECTIVE