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.
The competition that occurred last season was quite tight between Arsenal, Manchester City and Liverpool, but slowly at the end of the season Liverpool and Arsenal slipped so that it was possible for Manchester City to become a team that continued to lead the championship until the end of the season, not only last season, even the previous season Arsenal has been able to give a lot of competition and pressure to Manchester City in maintaining their chances of becoming champions, In the last two seasons Arsenal have been quite consistent title contenders for Manchester City so I think they are also starting to deserve to be our favorites to win the Premier League next season.
The last two seasons should be an experience and a lesson for Arteta to get even better, Arteta needs to analyze where their team weaknesses lie so that it is very difficult to be able to break Manchester City dominance in the league so far, Arsenal who are often inconsistent at the end of the season must be able to improve their mentality and squad next season to be able to be better than last season, so that it will provide a greater chance to conquer Manchester City and become the Premier League champion next season.