I would like to know why my images are being rejected.

I don't ordinarily go to such lengths, but your AI examples show promise despite all the drawing errors. And with 37 total rejections, as it appears you've indicated, you probably need some editing practice in addition to recognizing errors. I've uploaded a reduced image of your original compared to how I would have edited it prior to submission. Your mission, should you decide to take it, is to locate the issues I've fixed and attempt to duplicate them using your original. This message will self-destruct in five seconds. (Start background music.)

I see a lot of conflicting angles and drawing mistakes. 

• The wall picture is unnatural. Head coming out of woman's chest, unformed hands, etc...
• In relation to the desk, the chair is angled one way & model's body is facing another. The positioning is weird.
• The cup vapor looks like smoke instead of steam.
• Finger tips on keyboard are munged.
• The computer screen contains many drawing errors...

There's so much going on.  You'll have decide if this is worth fixing or not.

Good luck.

Don't ever assume AI is perfect because it's not.  And the more complex your image is, the greater potential there is for things to go horribly wrong.

AI is a tool to use in your own artwork much as a painter uses pigments and brushes to fill a canvas. Used correctly and with proper care, AI can help you.  But I'm not convinced yet that AI can or will replace human talent.

• Examine everything carefully at 100-300% magnification. Fix errors if you can or discard the image.
• Compare your best work with Stock inventory. 
• Your content should be as good or better than what Stock already has & suitable for commercial use.

Hope that helps.

The woman kissing the man's forehead has six fingers.

The woman at the computer has mangled, poorly drawn fingers and that photo in the back...I can't quite figure out what it is, but something is weird about it.

Basic cleanup on the woman with headphones.