cannot hold a candle to somebody/something
can't hold a candle to (someone or something)
Cannot compare to someone or something; is not nearly as good or desirable as someone or something. The sequel wasn't bad, but it can't hold a candle to the original. John's fast all right, but he can't hold a candle to Louise!
cannot hold a candle tobe nowhere near as good as. informal
In the 16th century, an assistant would literally hold a candle to his superior by standing beside him with a candle to provide enough light for him to work by. The modern version suggests that the subordinate is so far inferior that he is unfit to perform even this humble task.