I've had difficulties at only Chinese restaurants in Canada, Hong Kong, US, UK whenever I must return dishes. Their staff vigorously defend the dish, counter and deny my observations, get angry and say something offensive.
I'm not Chinese, and surmise that I'm missing cultural in my communication. What am I doing wrongly, and what've I overlooked? Suppose that the food in a Chinese dish:
is obviously rotten. I touch nothing. I've been served choy sum that was yellow, spongy; had blotches, discolorations, or flecks on them.
or isn't obviously rotten, but you can taste that something's wrong after one bite. I've been served gai lan that's too stiff and unpiercable (unfresh?), and undercooked seafood.
Then a 10-minute dispute follows. The manager will argue that nothing's wrong, and that I'm just unfamiliar with Chinese cooking methods. When all else fails, the manager blames me for not communicating my preferences to wait staff:
Oh my God. You didn't tell us before. And now you want this and that.
How can I know you're so picky, if you said nothing before?
For the rest of the meal, staff glower at my table.