It would serve him right if he lost his job after how he treated his colleagues.

如果他因為對待同事的方式而丟掉工作，那真是活該。

You left your umbrella at home? Well, that will serve you right for not checking the weather.

你把傘落在家裡了？嗯，誰讓你沒看天氣預報，活該。