I think Arsenal have fought their best in the champions league tournament, it's just that maybe they are not used to and do not have high qualifications to compete in the champions league, as we know that the champions league has heavy-beart clubs, they are the strongest opponents from their respective domestic leagues so it is very difficult to get a win in the champions league.
The impossible thing for Arteta to do is to waste time in the champions league, because they have always entered the champions league so far so it is very difficult to say that the champions league is just a formality match for Arsenal, while there are many teams out there who want to enter the champions league.
The champions league is indeed very extraordinary and yes Arsenal need to pay attention to their team again to be able to compete, some substitutes as a second choice when one of the core players is injured they have a substitute who is worthy of competing and can carry out the same task and in ability and performance should not have a very far difference between substitutes and core players because it will be very heavy in a team.
If Manchester City, Real Madrid and Bayern Munich are the top three clubs in the Champions League, then I think one more club should be added here and that is Arsenal. Maybe we don't see such a good performance from Arsenal in the Champions League, that's why we can't put this team in the list of favorite teams. Injury problems are unwelcome and can happen to every club, but Arsenal's players are known to have the most injuries every season. If you have looked at Arsenal's performance in the last Champions League season, they have not performed where we would consider them the best team for the Champions League.
Arsenal need to plan to do well in the Champions League in the same way that Real Madrid plan to win the Champions League trophy. They should consider the Champions League tournament as mandatory, leaving the Premier League as a secondary option, but they will do well in the Champions League
That's a bit of an exaggeration because after all, although I realize that for the last 2 seasons Arsenal have been quite good, but for the Champions League the fact is that they are still far away if they are considered as one of the seeds with the greatest probability especially with the existence of several clubs such as Madrid and Manchester City.
Arsenal are good but we also have to realize that in the end we can see Arsenal's performance is not that good when talking about competition in the Champions League. Not only in the current Arteta Era but indeed from previous eras even during the golden era they were unable to become champions because their best phase in the Champions League was only up to the final and that happened almost 2 decades ago.
Indeed, I know that in the end Arsenal are still very good for a club but in the Chmapions League they have to be better than now if they want to be juxtaposed with some big clubs who are regular champions in the Champions League because for now Arsenal still don't have that kind of capacity.