Machine nail improperly driven in bottom of leg gouged floor

This looks like a great chair that is easy to put together. However instead of nailing the plastic floor protector in the recessed hole in the middle they drove in two square machine nails, one on either side of the hole. One of the nails was protruding above the plastic and gouged the floor. I would rather have had them include the guides and four normal nails in the box and let me hammer them in myself.

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