Nowadays many employees like to complain about their idiot boss.

What they don't realize is that if the stupid boss were a little smarter, they'd lose their jobs.

Notes:

1. Nowadays many employees like to complain about their idiot boss.

现今许多员工喜欢抱怨他们的笨蛋老板。

"complain"做为不及物动词时，后通常接"of/about+sth."，如：She complained of / about his carelessness.她对他的粗心表示不满。做及物动词时后常接由that引导的宾语从句，如：She complains that her husband always comes home late.她抱怨她丈夫总是回家很晚。

上班族有时会对老板有怨言，但是千万不能说老板笨，因为…

employee [ɪmˈplɔɪi:] n.员工

complain [kəmˈpleɪn] v.抱怨

2. What they don't realize is that if the stupid boss were a little smarter, they'd lose their jobs.

他们没有认清一件事，那就是如果他们的笨蛋老板聪明一些,他们就将失业。

what是先行词和关系代词的结合体。等于the thing which。