Arsenal have spent a lot of money in the last few seasons to build their squad but they have not been able to win any major titles and that is clearly a failure. If you look at the game graph, The Gunners have always been able to improve but mentality is a big obstacle that makes performance inconsistent. And in my opinion if this season fails again to achieve achievements then Arteta's position deserves to be evaluated and it is very possible that a change of coach is a must for the sake of the big target to be achieved.
Arsenal manager Mikel Arteta for a truth have spent a lot of money to build the squad and if you ask me, I think Arsenal as a team have a near-perfect squad that can compete in the highest leagues in the world but he has one problem and that's a top 9 striker role. Arsenal would've achieved more under Mikel Arteta if he had an energetic box-to-box striker that has all it takes to muscle out defenders and make his presence to be felt by any opposing defender.
Currently, Arsenal manager is relying on Kai Havertz to deliver the team in terms of scoring goals but I don't think the Germany international can do more than he's currently doing at the club