Arsenal are often inconsistent, it's a problem they have to fix. This team used to be really able to perform consistently, as evidenced by a brilliant record that was very difficult to do. Yes they have won a season unbeaten record. But that happened a few years ago, it should be a motivation for the management, coaches and players to make their performances even better.
Consistency has been a problem for arsenal so far and even that has happened since wenger was still coaching arsenal, the nothing who have experienced players and the spirit of leadership in the arsenal squad so far I think is one of the reasons arsenal does not have consistency in their game.
If you look at the team's performance this season for Arsenal, it's been a bit good, but it's still not enough to compete with other big teams in any game.
But Arsenal still have time to change and improve things now or before next season starts, because without changes from now on, it will always be difficult to get good performances.
In the middle of the season indeed arsenal performance was quite good and stable but by the time the game entered the last weeks of their performance actually worsened, if you look at arsenal all this time of course you can see if it looks like it has become a disease that continues to recur every season, yes with the arrival of new players The likes of Fabio Viera and Gabriel Jesus are expected to bring a little change next season and maybe we will see a different arsenal in the next season although I doubt it a bit.