quality issue on a series of ai images

Refusal reasons are always generic. That is highly efficient for the moderation process, but it may be, indeed frustrating for the contributor. However, moderators refuse on the first error they see, so even if they would point out the error, you would be frustrated again, receiving the next refusal on a different part of the image.

On your third, the moderator did not see the "floating" branch:

You also have colour clipping on the background.

With the third asset I have problems with the out of focus blossoms, whitch are a bit disturbing. 

If you correct the errors as pointed out by @Jill_C , I think that you can resubmit.

Contrary to @London346958332gex, I do not see noise or artefacts in the background space, except the colour clipping on the third picture. The background texture on the forth looks natural. 

Now they will tell you that all these images should have been rejected.
But in those that were accepted, the moderator made a mistake and did not notice the blots!
Perhaps they will also say that Adobe has increased the quality requirements, and that too many AI images are being received and there is not enough space on the servers!
And no one here is helping to solve this problem.
Even if you provide perfect work, they will draw a red line around the empty space and tell you that there is noise or artifacts.

Perhaps we should now face the fact that there is a war on AI images here!
And the local participants carefully hush this up, proving that there is no war here, you just need to be more careful and work better.

I would like to see an official statement from Adobe about increasing quality requirements with at least some description and indication of what is no longer accepted, for example, people with three fingers, and with specific examples of artifacts.

It is strange that such a statement has not yet been made.
And it’s strange that if we go to the new images category, we will see that even more obvious marriage is accepted.