What are you expecting?

Bugs can be almost anywhere and food is an attractant for them. IMO, most of the population would just take this in stride, ask for another meal and move on. If you're looking for something like a $500 goodwill gesture for your trouble you may need to re-check your expectations. A restaurant would comp you the ~$15 entrée. AC food is probably comparable to this price range in a low-end restaurant. Assuming you will fly AC again, the 15% code exceeds this likely by a wide margin.

It is not my intention to minimize how it affected your personally, but to provide another perspective.