I have suffered a martyrdom from their incompetency and caprice.

我因他们的无能和反复无常而殉。

He listened to her moans about lost customers and bad debts, the swindling ways of Mr. Johnson and the incompetency of Hugh.

他总是全神贯地听发牢骚，说失去了顾客，放了呆帐，约翰逊先生如何欺骗，以及休多么无能，等等。