My friend and I are doing Ai images same way, yet his are accepted and mine are declined.

That metal booger though, in image #2 . . .

The cat image brightness and/or contrast is off. The cat also has a lot of white specs that are distracting.

Image 3 has a random strand of something protruding from the woma's choker, her eyes are poorly drawn, her nose ring looks like a cartoon nose ring, etc.

You need a keener eye for this kind of stuff. And so do I. I'm constantly trying to increase the quality of images I submit by being my own harshest critic. These images are bad. With some work they could be good. The cat image might be a lost cause though.

Writing prompt after prompt after prompt after prompt is not "hours of work." Editing the results of those prompts are. If you wish to be successful at stock, you need to review your images from corner to corner and edit them as needed.

Moderators do not reject images out of "rudeness." They reject them if they notice errors, regardless of how much time you spend creating or (most importantly) editing your results before you submit them. 

Moderators don't reject images out of laziness or rudeness; they reject them when they see a flaw or something that violates one of the Adobe guidelines. Rather than taking rejections as a personal insult, you should regard each rejection as a learning opportunity. Once you learn to recognize the errors in your images before you submit them, your acceptance rate will improve significantly.

Show us these images at full size, and you'll receive useful feedback.