I had contacted the seller shortly after posting, I am waiting to see his response. If I am not satisfied I will attempt to fill an eBay claim, this is a pretty absurd condition for a monitor to arrive in, and I'm not entirely convinced Fedex is to blame considering the box itself has no signs of damage, but there's a good chance shipping without bubble wrap to protect the box is just a really poor idea.
This is an important fact. As the box has no sign of damage, especially those 2 corners, it is now more logical to deduce that the damage of the 2 housing corners are there before shipment. I hope you have taken pictures of the then unopened package showing no sign of box damage as a record and proof if and when needed. If not, I hope you have not thrown away the box yet.
Also, how about those internal foam wrapping, usually found around corners? Are those foam 'damaged' or 'compressed/squeezed/disintegrated'?
The 2 pics below show the internal foam protection of 2 Chinese versions of the Shimian QH270 equivalent monitors.
(Lastly, this is precisely why I said earlier the necessity of opening the package to do a quick physical inspection right in front of the delivery man before he left.)
I hope your problem will be handled satisfactorily either by ebay or the seller or Fedex.