In fact, the Arsenal team once performed exceptionally well. In earlier days no other team could have secured victory easily with Arsenal team. But currently the performance of the Arsenal team is not consistently good. Compared to previous performances, Arsenal are far behind now.
From the start of the season for 26 matches, Arsenal has managed to secure the first position in the standings, indeed it is extraordinary, no one can replace it and maybe most people have assumed that Arsenal will be the winner at the end of the season. But it turned out they were wrong, after several players suffered an injury Arteta lost the balance in terms of form and resulting in Arsenal losing their last few matches towards the end of the season. This is very painful but indeed nothing is impossible. Guardiola was extraordinary, he managed to win consistently, bringing the club up in every game with a very satisfying ending. The Citizens have managed to secure the Premier League title this season.
Actually, Arsenal's achievements this season have been very good compared to the previous season and with the new squad built by Arteta, Arsenal have been at the top of the standings for quite a long time. But indeed I agree with the many Arsenal players who have started to experience injuries making it difficult for them to maintain their top position and Pep Guardiola took advantage of this opportunity to bring Manchester City to shift Arsenal's position.
Had none of the players been injured it was pretty clear Arsenal would have won their first EPL title in 20 years. I think the competition between the two teams is quite healthy and it's just a matter of how the two teams can react to it, but there is a slight note for Arsenal if they can still be consistent for next season they have to get some new players with quality that is commensurate with regular players so that if there is another massive injury then they will not be confused to find a replacement option.