Criteria for acceptance or termination of submitted works

Hello dear experts. I have recently started uploading pictures to this resource. I do some things myself, and some things with the help of AI. It seems that the approval or denial to upload an image depends entirely on a particular moderator, who is currently working on the shift. Some specialist will accept and some specialist will not.  In the beginning I didn't really pay attention to details, errors, and artifacts in the image. Then, thanks to your forum began to study and carefully approach to all the nuances. I have previously accepted works on the resource, which now I would not even upload myself, because of their obviously poor quality. But they were accepted. So I am not quite clear about the selection criteria. Today I had nine images of the same subject rejected at once. Images of toy teddy bears on a transparent background. They are made with AI, in the same style. It took me a long time to process them. The reason for rejection is quality problems. Standard version. And so I have a big request to you - please point out my mistakes in the work that I would not repeat them. I will provide one image with a robot, which was accepted, but clearly does not meet the requirements. And two images with bears on a transparent background, which were rejected. I really need some clues on the bears. Thank you for your time. And thank you in advance.