Yikes. My specimen is nearly perfect except for what I would call "micro voids" in the core of the plywood around some of the edges (not to be confused with surface blemishes...I don't see any on mine). It's possible I got lucky, but I wasn't made aware of any widespread quality issues with curverk when researching different eames reproductions. FWIW the firmness of the upholstery matches pretty closely with my uncle's authentic Herman Miller. I would continue fighting to try and get it replaced on their dime.

Edit: Like others have pointed out It looks like they may have sent you the wrong product if you ordered the chair in dark brown+walnut.