~snip~
Arsenal is not even in a good situation in Premier League and that's why I think we can't expect them to have good results in the tournament like Champions Legue.
Arteta is getting more experiacned and he id making progress but he is still far from a coach like Ancelotti with lots of experience in Chmapinos Leeague and tthat's why I think Real Madrid will have much more chance than other teams.
There are several teams that do not perform optimally in domestic competitions but they focus on important competitions such as the UCL, it's just that for Arsenal they don't have the opportunity or way of working like this because Arsenal doesn't perform optimally in the Premier League and can't be optimal in the UCL.
I don't know why Arsenal fans can still believe and expect their proud team to win the UCL or Premier League when they know that Arsenal doesn't have that ability.
For the Premier League, maybe in the next few seasons they will be able to win the title but not for the UCL.
In the UCL competition, there are many big and great teams that can always destroy the opposing team, including Arsenal, and many changes still need to be made for Arsenal to reach a truly strong condition for the UCL.
But you are right that Arteta does not yet have the experience and greatness like other coaches who succeeded in bringing their teams to the UCL like Ancelotti or Pep.