ejection of submitted photographs by Adobe due to poor technical quality.

Please post the same assets you've posted to Adobe Stock to the community.

Photography preferences are interpreted independently by each user.
The photos you like and the photos Adobe Stock likes may not necessarily match.

Yes, Adobe is biased. Their customers lean more toward working professionals in print, social media, film, TV, marketing, textile and the merchandise sectors.  As such, they demand commercial quality content.  Other stock services are not as discriminating because they appeal to different customers.

Read your Contributor User Guide for more details.  

https://helpx.adobe.com/stock/contributor/user-guide.html

https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html

For better feedback, we need to see 1 or 2 rejected assets and the reasons for refusal. Often a 2nd or 3rd pair of eyes can see things that you may have overlooked. 

Reviewers stop examining after the first refusal reason is detected. There may be additional reasons for refusal that were not mentioned. Keep that in mind if you decide to fix the image and resubmit it under a new file name.