The funniest part is that Arsenal can start the season with great performance that will make everybody think that Arsenal has arrived and they can win the title, but they are not keeping their consistency till the end of the season. This is the same mistake that has been happening for a long time now.
Arsenal began two latest seasons better than they did in this season, and they currently don't have good situation in the title race with Liverpool. Arsenal will have to satisfy with a second position in this season, and aim at a next season but firstly with a summer transfer market for new players who come to improve their most weakest positions in their squad.
However, to me, the problem is from the coach, not the players, because Arsenal has the squad to play and win matches, but you feel like Arteta always gets confused when the season reaches some certain stage. Arteta is not really ready to take Arsenal to where they are going or is not capable of winning trophies for them.
Stop blamming it to the coach who succeeded to help Arsenal competing Premier League titles in last two seasons and before Arteta, some head coaches failed to help Arsenal having a position in top four. So from a dream of top four position, Arteta not only achieved it but also managed to help Arsenal securing a second position and competing for the title. It's very good improvement he has done for the club, and maybe he has his limitations but Arsenal has weakness in their squad at a striker position. This has not been resolved so it's unfair, at least now to say main responsibility belongs to Arteta.