Because the servers communicated in their mother tongue among themselves, some customers complained and thereby made a pathetic display of their own shortcomings.

They're aware of their shortcomings.

Tom wasn't afraid to talk about his own shortcomings.

You are too critical of others' shortcomings.

You're too critical of others' shortcomings.

I am not without my shortcomings, but these shortcomings can easily be amended.

He's aware of his shortcomings.

Tom is aware of his shortcomings.

My mother and father are the only people on the whole planet whom I will never begrudge a thing. Should I achieve great things, it is the work of their hands; they are splendid people and their absolute love of their children places them above the highest praise. It cloaks all of their shortcomings, shortcomings that may have resulted from a difficult life.

Apart from a few shortcomings, it's a good book.