Judging by the responses, it seems there are three groups who don't like it:
1) People who find it doesn't represent value for money or for whom the marginal value of $1000 doesn't justify this phone (as you describe). This group includes those who complain about fragility because that is really just a cost of ownership issue.
2) People who don't like innovation (Face ID, Improved one hand usability, although slightly narrower but still large screen, true color display, etc.)
3) Those with more traditional aesthetic tastes (prefer a large bezel at the top like the Samsung over the notched edge to edge display of the iPhone X).
The good thing is that groups 2 and 3 are clearly a small minority whose opinion will have no saliency over time. We saw this with the people who refused to get the iPhone 5 because they preferred the dock connector to lightning), same thing with the iPad when people complained about the warmer more accurate colors on the retina displays.
As for the first group (who deny they exist), their issues will disappear when the price comes down next year and again the year after. The second group will become smaller when the X+ comes out next year borrowing the 6.3" display from the S8+.
[doublepost=1510172709][/doublepost]
When you say people, you mean a minority of qualified prospective customers. I have yet to see any data that suggests this phone isn't selling well or that the return rate is unusually high.