Uncanny valley is the unpleasant experience one feels when confronted with something resembling a human, that isn't one (e.g., a creepy Chucky Doll). I do not know if there is a term specifically to describe the cognitive dissonance for inanimate objects.
While images like these look somewhat real you instantly get a very very unpleasant feeling, and it is very distinct from the feeling you have looking at imperfect sketches or drawings or paintings done by humans.
It's the sum of countless details that just do not fit together. Malformed objects, lighting, composition.
For lack of a better word, this image embodies the very concept of "slop". Its mere existence is truly unpleasant.
Don't get me wrong: You CAN fake reality pretty close, e.g. selloak does very very convincing impressions of real food like post #159968




