We would like to the the reasons as well. Was it due to Quality Issues? Technical Issues? I assume the former. In 1.jpg, the teeth are mangled, at least the bottom row, and there is a good deal of haloing around the wings and body, which probably occurred during upscaling. Without taking a deep dive into 2.jpg, there are some areas that could use some spotting. There are a lot of extraneous white specks floating around.
Adobe Community Expert | If you can't fix it, hide it; if you can't hide it, delete it.