Jurgen Klopp, the manager of Liverpool, strengthened his midfield this summer by recruiting three wonderful midfielders capable of thrilling the entire midfield and important aids to the frontlines in terms of key passes. Darwin Nunez finds it difficult to adjust to Liverpool's football pattern, and the club has not performed up to expectations, being too hesitant and recording dismal results in league games. Competing against Erling Haaland, I don't think he can compete with the Norwegian international since Liverpool lacks what City possesses, which is a dominant midfield.
I think it would be pretty unfair to directly compare Darwin Nunez and Erling Haaland just by their personal stats because Haaland is playing for the best team in the world at the moment that is scoring a lot of goals and therefore it is just a logical consequence, that he is also able to score a lot of goals because he simply gets so many chances. Nunez on the other hand is playing for a team, that was not doing so well this season for their standards.
Still i think it is fair to say, that the officials and also the fans of Liverpool expected a little more from Darwin Nunez. Liverpool has payed 80 Million € for him, which was way to much in my opinion and so far he is not performing on a level that would justify such a high amount of money for him. He is still young though and he can improve.