why does rainsford decide to confront zaroff in the end, rather than ambush him? what does this reveals about his personality?

Rainsford is a man who has always risen to the challenge; he could have simply escaped and Zaroff would have thought him dead. However, he wants Zaroff to know he lost and he wants Zaroff to feel the fear and dread that the animals, when being hunted, also feel. He also wants to send Zaroff to his death and will not have any other ending. He has won and he wants Zaroff to know.