200 Image Rejected for quality issue

Moderators refuse at the first issue they see. No need to look further. So, it is impossible to say, what exactly did disturb the moderator. But if you submit assets with plenty of issues, chances are, that at least one of those will trigger the refusal. Having looked at one of your assets, I think you simply submitted whatever output the computer gave to you, without checking the quality of the assets. In the past, a lot of those assets passed.

I even did not know how to nark all the errors in that small space:

But I'm quite happy, that increasing the quality of the checking is having some effect. Moderators are doing a better job than before. Concentrate on less and higher quality. That will give you a greater success.

If you are new to stock, you should consider these resources: https://helpx.adobe.com/stock/contributor/tutorials.html
Please read the contributor user manual for more information on Adobe stock contributions: https://helpx.adobe.com/stock/contributor/user-guide.html
See here for rejection reasons: https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
and especially quality and technical issues: https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html

@daniellei4510 pointed out several rendering errors. I see  such error in each image you posted.

Seriously, 200 rejected images? 

Spend your time to create 20 quality images that will get accepted and that can be sold.

You must edit your images to correct the errors in rendering.

We are not the ones who rejected your images. We are contributors like yourself. In the future, uploading two or three images for review are sufficient. I grabbed three to comment on. View your images at 200% to 300% it look for rendering errors like those I've noticed in these examples.