Two aspects had affected the rating for this photo:
one is the ample negative space. Not all viewers like the same and the moment you make an overload of that, some people tend to leave you low scores.
Second, I didn't understand the meaning of those 3 dimensional lines. Was it intentional or maybe small areas which was left out while making a light-tent? Whichever way, the same is not giving anything extra to the otherwise wonderful egg, and IMO could have been avoided.