I believe Arsenal can go further in the Champions League and also try as hard as possible in the Premier League, the most important thing is that Mikel Arteta can always overcome existing mistakes without having to feel pressured because Manchester City will always remain their main competitor. I have seen in the last 2 seasons actually Manchester City is not much different from Arsenal, as long as this club remains focused, then they can break Man City's dominance.
Manchester City and other elite clubs have been amazing and promising in the UEFA Champions League, just a better call for the big winning. Arsenal have everything, the one thing that keeps them up is hope and determination. Mikel Arteta have packed his best strategies infront and there's certainly going to be evidence for the team, it may not be now but in the nearest future, there's certainly full hope and success is ahead.
Last season Arsenal managed to record impressive statistics by reaching the quarter-finals, in previous seasons they were only able to reach the last 16. Unfortunately, their steps were too difficult because they had to face Bayern Munich, which has a better reputation and mentality in the Champions League. Arteta certainly realizes that competing in European competition is much more difficult than the Premier League, and extra preparation is needed to become the best team in Europe. In my opinion, Arsenal are currently just unlucky, they have made their best efforts to achieve the target, the depth of the squad that Arteta has built is also no less good than Manchester City. Maybe Arsenal success is only a matter of time, so they can change history by winning their first trophy.
The performance of Arsenal last season was above average because in all competitions they were outstanding in their performance but the problem that has been affecting the team from advancing further in the domestic league and champions League is the level of average players in the team. Arteta has been rebuilding the team in the last two seasons and they have improved in performance and their winning mentality has also increased but they need more experience to be able to withstand opponents in the champions league competition and this is necessary because last season they had the opportunity to win Bayern Munich to advance to the semi finals but they were defeated by Bayern Munich because of lack of experience.
Arsenal needs to bring in more players to be able to stand against Manchester City who stands as their biggest opponent in the domestic league so they need players with good skills and experience order wise they will keep playing well without winning trophies.