If you think it is only when Arsenal wins the Premier League title that they will have a great season, you are totally wrong. We know that Arsenal was close to winning the Premier League title on 3 occasions, but they failed to do so. Arsenal finishing in the second position in the Premier League table is already a great season for Arsenal because the Premier League is a competitive league, and any club that finishes in the second position in the Premier League table already had a great season.
There are many tasks that need to be carried out by Arteta and this is the third season for Arsenal who have always failed to achieve the English league title. Arsenal's level of play has indeed increased, but this is not enough for them to come as title contenders because in the end they always fail to play consistently when entering the end of the season. I doubt Arsenal's mentality in competing for the title and if Arteta cannot maximize this, then every season will always fail to present the title.
The quality of the players owned by Arsenal can be said to be quite good, it's just that they don't have a champion mentality. It is strange to be at the top of the standings for three seasons but then have to give up the title to another team in the end, even though last season Liverpool were much more solid in terms of maintaining consistency.