If the reviewer's have reason to reject a shirt design which the seller obviously thinks is fine, why not give the reason for rejection? It is such a waste of everyone's time to send a copy & pasted message.
I have had one shirt rejected and I had to "appeal" the rejection via email and there was NOTHING wrong with the design or the title/description. Eventually, the design was accepted and posted for sale. Now, months later, I have had another shirt rejected and I have no idea why. Is there no alternative but to do the same back and forth emailing to figure out what (if anything) is wrong?
Stating the reason in the original rejection email will avoid the multiple emails back and forth and maybe the reviewers can push shirts through faster if they were not wasting time answering emails challenging rejections and reviewing re-submitted designs.