Quick comment to help explain why this is getting some downvotes (in my best guess): The part where you say you try to treat service workers with respect but have your limits is fine / personal experience / probably broadly relatable, but the parts that are basically calling BS on someone for claiming they never lose their cool in such situations is… presumptuous and personal.

Some people really have the ability to keep their cool (for one reason or another, trained or personality-driven).

Personally, I’m with you, but, I think, making progress on becoming more like the person you’ve replied to.