Been going to this place for years 2 or 3 times a ...

Been going to this place for years 2 or 3 times a month with my family of 4 and it's not a cheap bill but the last time I came I asked for teriyaki sauce on my chicken and bean sprouts like I always do. I order the Japanese Palace special every time with no onions on anything because I allergic. This time the cook is upset I ask for no onions and he made smart ass comments while cooking the whole meal the he he puts the reds Sauce ( the one made with mostly onions) on my stake while he is cooking it. Then when I ask for teriyaki sauce on my and my child's chicken he refused. I asked to see the manger she said the only use another grill for teriyaki chicken and the teriyaki sauce damages the stainless steel cooking top. Which is stright BS. I wouldn't even go back for free