What is King Saying About Society?

I feel like Thinner is intended to be satirical. He depicts each character in an equally unlikable way. Most authors present the protagonist as a likable character who the readers tend to root for. However, Billy is selfish and pretty disgusting. His top priority seems to be food. Every other sentence is about some different food Billy is eating. "During his commute home on Tuesday, he pulled off the Connecticut Turnpike at Norwalk and picked up a couple of Whoppers with cheese at the Burger King there. He began eating them the way he always ate when he was driving, just working his way through them, mashing them up, swallowing them down bite by bite" (Chapter 5). Billy obviously has an eating problem and he lives in a constant cycle of saying that he will stop eating junk food but never does so. King presents Billy as a character who has no control over his excessive eating and is the stereotypical American. Americans are often associated with being fat and loving fast food and Billy perfectly embodies that stereotype. His wife, Heidi, is the typical house wife. She cooks, cleans, and waits on her man's every need. And their daughter, Linda, is the typical teenage girl who cheers and struggles with all that high school drama. King gives this average family a twist by having the father hit and kill an old gypsy with his car. Why do you think King creates the stereotypical American family? Do you think he is being satirical and criticizing society?