The reason why I am not confident about Arsenal is two things;
1. Arsenal is not a club that will be in somewhere 4th or 5th position during the mid season and later give a surprise to the top before the end of the season.
2. Arsenal is a club which can be at the top of the league and later give up two weeks to end of the season.
For these two reasons, I do not trust Arsenal with the English premier League title. They can comfortably compete for the top 4 but I do not trust them to win
I have not ignored your opinion because this is a fact that has happened since the last few seasons, Arsenal can always reach the top of the standings but towards the end of the season they get worse somehow Arsenal always wasted the opportunity in the 35th match and others and this season it happened, I was not surprised to see Arsenal in the 4th place this week, but I'm sure Arsenal can secure one ticket to the Champions League next season.
Arsenal may just need to be a little smarter in planning their strategy for dividing players in each match. Arteta tends to always field the main squad even though if you consider player rotation like Manchester City and Liverpool do, stability will be easier to control. Every match doesn't have to always score 2 to 3 goals, but Arteta is too ambitious about goals so like it or not he wants his core players to continue playing as the starting eleven. Sometimes the strategy of rotating players is a risky action it's just that some clubs are trying to get used to reserve players who rarely appear being given the opportunity to contribute. I'm not surprised why Arsenal finally slipped again, even faster this season than before.