I know that. Too many of the Chinese restaurants are staffed with Mexican cooks. Anytime I see that I turn around and leave or never go there again. The quality of food in those cases is usually poor. Seen the same thing in other restaurants as well.
Even at the top end restaurants most of the back of the house is hispanic. They rule the industry now, and the food is no more likely to be bad than it was in the days before they took over.