If we compare formally, Arsenal scored a solid 84 points, which, although less than Liverpool's phenomenal (for second place) figures of 90 ++ points, but more than, for example, the number of points that Leicester scored in their championship season. Therefore, I also think that many teams showed a good level in the Premier League, but the fact is that City are in a different league and now it is almost impossible to compete with them.
Now let's imagine if Haaland gets injured who has contributed 36 goals what will happen to Manchester City still reliable? so this is where Manchester City's weakness problems like this can come at any time while Arsenal do not rely on one player they play their respective roles while on the field. I still have hope that Arsenal will be the strongest competitor for Manchester City so we won't see the dominance of just one team.
Before the arrival of Haaland City dominated the same way as last year. Haaland scored a record 36 goals, but this is not only his merit, but the whole team. And by the way, if you take Kane, who scored a solid 30 goals, then they didn’t help Tottenham in any way (8th place lol), so I don’t see a direct correlation and dependence of City on Haaland here.
It is clear that a series of injuries can greatly affect any team (like Benzema's injuries hit Real Madrid last season), but all teams are at risk.
its current market value is only 20 million if they wait for next season obviously it will drop even more because he is already 31 years old. 
I even remember a statement from their side actually like they weren't expecting such high amount of offer for him in the first place.