Need feedback on my Images

Hello,
I submitted around 300 images, all of which were rejected. I've attached some examples for context. These images were carefully cut out, upscaled, color-corrected in Photoshop, and cropped properly to avoid empty space. At first, I thought the issue might be with the cropping, as I ensured the shapes (like hearts) fit symmetrically with other images. However, I noticed a user with 250,000 images had the exact same shape and cropping style approved.

Could you kindly share why my images might have been rejected and how I can improve? Thank you!