It's gas station food, what he'd expect

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He's right about one thing, though.
Sometimes people confuse, or conflate quantity, and to some extent low prices with quality, meaning that the place he went to probably serves large helpings of food (like that carton he had with the rice, chicken, etc) for a cheap price, y'know, think Chinese lunch special at the mall prices, and a lot of locals conflate the quantity and low prices as equaling quality food.
So their taste buds adjust, and their minds have convinced themselves that the food is good and they're getting a bargain. Whereas with Chime, since he's not a local, he can see and taste the food for what it really is: garbage.
In other words, to the locals, it's decent, fulfilling food for a low price, but to Chime, it's garbage, it's low-quality, y'know, like slop you'd give to a dog or pig. So he won't see or understand the appeal the way New Orleanians do.
This is common in most cities. People hype up certain local eateries in their city and think it's elite when it's either mid or worse to an outsider not used to that particular taste of the food.