Nunez may not even be remotely close to Haaland, but I agree that the team plays a big role in there. If Nunez played for City and Haaland played for Liverpool, I think we would see Haaland score less and Nunez score more. Would Haaland still score more than Nunez? Maybe, maybe not.
I think the teams involved does play a huge role here. Nunez is a very talented player as well and could very well be relied upon to score goals. Manchester City plays beautiful football as a team and does a pretty good job of getting the ball over to Haaland who then goes ahead to score goals.
I agree with you that if the roles were reversed and Darwin Nunez was playing for Manchester City, we would see Nunez score more goals and Haaland score less. I think the entire team hugely contributed to a very successful first premier league season for Haaland.
With a squad like Manchester City, Nunez might have scored a lot of goals. Not to say that the Liverpool squad is weak. However, since Sadio Mane left the team, Liverpool's performance has completely collapsed. And their performance was very erratic. Because of this, the team has not consistently performed better than Nunez. However, in the last few games of the season, Liverpool played very well and their performance was stable. Therefore, it is expected that Liverpool's performance will not be irregular in the next season. At the same time, Nunez will be able to score a lot of goals if he gets enough support from his teammates.
A lot has indeed gone wrong since Mane's departure, but let's also not forget that Virgil van Dijk has left the best days behind him too. Since he recovered from his serious knee injury, he has never reached his old level again. He used to lead his defense perfectly, but now it's almost winning every game and it's all leaking like a basket in the back. Van Dijk is not someone you can just replace, but I think you're going to need more leadership at the back for Liverpool. Otherwise it could be another catastrophic season. If Klopp performs poorly again, it could be the end of the story for him. And was Arsenal's performance a fluke or were they just really good?