What I seriously hate about US based Desi restaurants

TLk I think there are couple close to universal and both suck, my cousins were visiting and we decided to eat at desi resturant, we ordered biryani and tikkah thinking that it won't be old but when we got the good biryani looked old---over heated and tikkah was too dry and especially from the corners---another sign on over heating... then my cousin asked the owner if they had buffet and he said yes...lol