What do you think about telling the bakery manager that a girl at a bakery should be fired?
Why do you want her fired from the bakery?
Because she is being rude with people, she makes people angry a lot.
If a service worker is being rude and other people upset, that is inappropriate behavior and is something that should be addressed. It's never appropriate for an employee to let out their frustration at work out on the customers they serve. While firing should only be done as a last resort, it still would be a good idea to let the owner of the bakery know what is going on so that the employee could be put on an improvement plan.
I guess I can thank you for that insight but I already complained to the owner.
I think you did the right thing in this situation. The owner will probably speak with her about the expectation to be kind to customers. Hopefully she'll learn, and your experience at the bakery will improve.