As previous posters have written...you could have spoken with the manager and explained that the reason your family enjoy's Chili's is because the portions are larger and the food is good. He/she would have probably accomodated you and you would have not left feeling hungry and disappointed and angry because you spent $50 for nothing.

But this was your own choice to leave without mentioning anything. So other than just getting this off your chest and being $100 less in your wallet I hope you have released some of your anger and will now use small case when typing.