I think arsenal have a problem not only in the squad but also in the mentality of the team, I have repeatedly noticed how in the most important moments they make mistakes that end up being solvable. Last season, compared to the previous one, things were much better, but still not perfect. But it's fair to say that Manchester City made a lot of mistakes last season, too. Besides, for the Champions League, the psychological stability of the team is very important
Is it about mentality or form of strength which is still considered weak when faced with stronger teams. Of course, the question of mentality is something that is often said, especially in the Champions League. Of course, in the Champions League, every team must be able to exert extra strength when they face a team they have never faced. If you look at the changes made by Arteta, of course he has made great progress in improvement after improvement, but if Arteta continues to fail in bringing trophies, of course in the final assessment he will fail to make changes.
Arsenal target may not be the UCL trophy but they are more focused on the EPL trophy as they did in the previous season. I think they need to lift the EPL trophy first before focusing their strength on the Champions League.