We don't need him involved in the buildup anymore because we have Yildiz, Koop and Gonzo plus a reanimated Locatelli and McKennie sneaking into the box. Their job is build up and creating chances.
Dusan's job is finishing the chances he's given plus drag defenders away to make room for the aforementioned players to take advantage of and score.
He's doing fine in this game, he's nowhere near the reason we've not scored.