Not that this is disheartening. Not at all! Rejection's part and parcel of writing. I'll get there one day.
Fellow writers facing rejection might find solace in Ha Jin's words from an interview published in AGNI Magazine:
The more ambitious you are, the stronger the sense of failure, because there are so many great books that have been written. When I was at Emory University I often taught a story by Kafka: “The Hunger Artist.” That story explains the psychology of a writer. Very often we write not because we want to achieve—maybe there was that desire, but so much has been accomplished. We can’t do anything better. On the other hand, you have to go on and continue. That’s why I think some sense of failure is essential to a writer from the very beginning.So there you go. Keep on writing, y'all.