So let me get this straight.
The airline decides on the seating configuration, the seats themselves, the pitch and the width of the seating.
Yet if you find that uncomfortable apparently it's Boeing's fault.......
My own experience of the 787 was with Thomson in PE, and I have to say it was perfectly comfortable. There is an issue with the seats whereby if the passenger in front of you reclines their seat you have difficulty getting out, but that's an issue for the airline rather than Boeing.