Most French waiters treat customers badly lol. I always complain about it, especially in Paris.
Welcome to Paris and have a good time!
And they get their revenge by spitting,
or even worse into your meal and serving it to you.
What is they say? Revenge is a dish served cold.... Beware the wrath of the waiter, they nearly always get the final word on the matter, but you don't always get to know what it is.