I understand disappointment in your customer service experience, but not in the pistol itself.
The 1st time I ever ponied up $1K for a pistol, way back in 1999 & equivalent to $1800 today, it was a Kimber Ultra Elite-the next year they changed the model name to the CDP. Less than 300 rounds in, the extractor broke; I paid plenty for the quality. My point is that ANYTHING mechanical can break.
My take from your post is that you are extremely disappointed in CS & getting the 1 sight screw replaced, than with the overall pistol itself.
Sam