A team like Arsenal has no chance of winning a major title if it plays in different competitions. In my opinion, a team like Arsenal lacks the strength to compete for the Champions League and the Premier League, instead, they should focus on winning one, however, every club that qualifies for the Champions League is expected to win the trophy but Arsenal goal should be one because we saw how it affected their performance last season, the players lacked the strength to compete in many tournaments at once. I believe Arteta should focus on winning the Premier League next season because competing in multiple competitions reduces their performance, they must lose one to win one.
I thought I was the only one that noticed that arsenal really sucks 
when it comes to Champions league, like they don't even put effort to make it pass group stage or probably they just what to focus on their League only or we might just conclude that they just lack the strength. Afterall, the League they are used to focusing on is not always favouring them, maybe if they put more effort next season then they might be able to accomplish their aim to be the Premier league champions once again but tbh they need to prepare more next season if they want to accomplish that.
Arsenal's elimination from the Champions League last season was not because they focused on Premier League games, Arsenal did not concentrate on the Premier League, which is why they used all of their key players to compete in the Champions League, it was just that they lacked the strength to compete in the Champions League, and Arteta seemed to give up. If you remember the game against Bayern Munich in the quarter-finals, you'll agree that Arsenal isn't good enough to compete in the Champions League. Arsenal has not won a trophy in a long time, and the last two seasons gave a perfect opportunity for them to do so. They don't need to fight like Manchester City, who won the treble the last two seasons, we believe that City has a good record of winning titles, but Arteta's next goal should be at least winning the Premier League, which other managers were unable to accomplish for the club for many years.