as a european who visited the US a while ago, the "fake happiness" as i called it was very offputting to me. Like, people working dead-end service jobs act way

as a european who visited the US a while ago, the "fake happiness" as i called it was very offputting to me. Like, people working dead-end service jobs act way to happy even when they have no reason to be happy. it seems so forced and fake that it actually gives me an unpleasant feeling. I see little need why a cashier who makes minimum wage should always smile, they are people too and can have a shitty day too?