It is an answer. Everybody had disappointing production in that series, but Robertson wasn't really given a chance to produce with less than 10 minutes a night in a disjointed bottom six and little PP time. Still, he was driving play well, got a number of good chances, and wasn't getting goals scored against him, after earning his spot throughout the regular season. And his best quality is something we desperately needed, and he's a young player that we want to gain experience.
Know who didn't produce, didn't do anything to justify a spot at any point, and who we didn't need? People who got spots over him. He's right to be frustrated.