Yeah Arteta just need to improve on the pattern he is using, though there is nothing wrong with his current patterns but since they have been using it for quite a while now but they still have not been able to win the premier League
Arteta has been ending the season in the second position for the past two seasons, so he has to do something. What Arsenal wants from him is not for him to end the season in the second position, but to win the trophy for Arsenal, which he hasn’t been able to do, so there are places where he has to work on. Arsenal is always playing well, but mostly towards the end of the season, Arsenal performance does always drop, so Arteta has to fix that. Another season will soon be starting, and the two teams that I know will be fighting for the league title are Arsenal and Manchester City, but I will say Manchester City have everything to win the Premier League next season again.
It seems like you don't really know the results Arsenal got last season because anyway, last season Arsenal kept their consistency until the end of the season. But, because Manchester City have one match postponed and thus, Arsenal were still overtaken by Manchester City. So,last season Arsenal have clearly become better than the previous season, because Arteta managed to make Arsenal consistent until the end of the season.
But yes, because the competing team is Manchester City, it will still be difficult for Arsenal to beat Manchester City in the race for the Premier League trophy. But the point is, Arteta has managed to make or improve the quality and performance of Arsenal and thus, Arteta only needs to maintain his pattern. Because if Arteta still manages to make Arsenal consistent in the next season, and if at the same time Manchester City fails because it has many problems such as cheating allegations, then maybe Arsenal will get very good results next season.