Really wondering if the servers have ever been trained....
Firstly, you -serve- the customer
Secondly, you don't mock the customer in front of them
Thirdly, you ensure they're enjoying the meal they are paying for
And lastly, you do not tell the customer what they ordered when in fact they weren't listening in the first place.
If you hate your job this much, just quit.
The food isn't even worth it.