incompetent|incompetents

她因为不胜任这份工作而被辞退了。

She was dismissed for being ___incompetent at her job.

公司倒闭是因为雇佣了一群无法胜任工作的无能之辈。

The company went bankrupt because it hired a group of ___incompetents who couldn't do their jobs properly.

那位医生因医术不精被医院开除了。

The doctor was fired for being ___incompetent at his job.