“Unsatisfied Customer! All It Did Was Make my Butt Flatter and Longer”

It definitely is your doctors fault. Final results and expectations with all the possible outcomes should have been explained to you--informed consent. No information should be withheld that might change your opinion about whether or not you would like to go through with the surgery. You simply trusted your doctor to do so. You don't know what you don't know. A flatten rear is expected unless fat grafting or augmentation is done. It's in all the ps literature.