Haaland is not always given opportunity when playing most especially against strong club’s, defenders are always holding Haaland tight, then leaving other players, their attention is always on Haaland not knowing that other Manchester city players are also dangerous, they believe if they can stop Haaland then their problem have been solved but they don’t know Kevin De Bruyne is also as dangerous as Haaland. Even without Haaland, Manchester city is going to perform well even without Haaland, their are some matches Haaland haven’t been performing well but Manchester city is still always winning, so they don’t depend on only Haaland for their victory.
At first I thought like you. But it turned out that I was wrong, Gabriel Jesus is not as good as Haaland, so Man City's strength increased many times after Haaland came. Haaland became a striker who needed a lot of players to stop him. This is because he is bigger and stronger. Unlike Jesus, he is good but not as good as Haaland. Haaland was able to attract many players to stop his movement. So Haaland opens up a lot of space for a second striker or midfielder to make a goal-bound shot from outside the box. It worked during the FA Cup final.
I think Haaland works as an extra player. Multiple defenders struggle to defend him, and even if they stop Haaland, there is still room for other players. Haaland has made an incredibly positive contribution to Manchester City. As long as this continues, Haaland will continue to be a major contributor to City.