I agree with you. If they want to win the Premier League title, they have to play consistently well. The fitness of the squad players must be good. If the fitness of the squad players is not good, it will definitely affect the performance of the team. Several key Arsenal players have missed a number of matches due to injuries this season. This has affected Arsenal's performance. The team lost points in many matches. And they are not able to return to the truck. And so if Arsenal are to aim for the title next season, they will need to build a strong squad capable of consistently performing well.
physical condition will greatly affect the performance of strength to compete but I think this is not a problem that exists in Arsenal because I think Arsenal players are mostly young and have very good physicality to compete in every match. it's just that maybe some new players haven't fully mastered the tactics or strategies to be used in every match.
in this condition it is quite easy and maybe Arteta is just more routine enough to undergo training and give directions so that he is more effective in finding opportunities to score goals in the new season.