I'm having trouble understanding what's happening. They've been rejected some of my photos

This is generative AI and rightly refused, if you submitted that as a photo. I you submitted as illustration (generative AI ticked) than it gor rightly refused for quality issues. As you didn't state the refusal reason, nor you didn't label the asset correctly (at least here), the final refusal reason cannot be stated. However, please note that the first error detected triggers the refusal, so all arguments are valid.

Quality: besides some odd geometries of livestock, you have aliasing, that needs to be addressed. 

There are also other artefacts. You need to check your assets at 100% for defects and sharpness.

This is not a photo. It is an image. If you submitted the image as a photo it will get refused and may result in your account being suspended.