In my case!I'm not a chef, just a cook helper probably.
But my family are who make me feel worst. I cooked a cebiche in a different way asked by my parents. It didnt taste bad, just a little diffrent.
So my brother said in front of the guests and family: I dont like it,,,,,,and he repeated 3 times,,,,, and after that he said: I prefer the cebiche that people sell over the road in the corner. That really made me very very angry, I couldnt be more patient and i told him: if u dont like it u dont have to eat it, but be polite during the lunch.