Here’s more on the topic of rejections.
Newer writers take all rejections personally as if the editors and agents dislike them. It’s a business decision.
I suggest that you try at least 10 publishers (or agents) before you give up. Some of my friends say 25, but you get the idea. If you still can’t sell your manuscript, put it away for six months and then look at it. If you’re growing and improving, you’ll probably spot the major reasons for getting turned down. (Or one of your writing friends may advise you.)
Finally, if you’re serious about writing, be patient and persistent. Those who succeed keep at it for years despite rejections.
Remind yourself that all writers (good and bad) have their work rejected. Like it or not, it’s part of being a professional.
A simple statement but true: What one editor hates, another loves. Don’t accept editors’ words as infallible. They’re not always good critics. Their comments are often hastily written (if they write anything) and without much thought.
Finally, never call or write editors to argue the merits of a rejected piece. Instead, use your energy to send the manuscript to other publishers.