Simeone will not be stupid enough to play openly against intermilan while milan has someone like calhanogly which was able distributing the ball anywhere. He has a very good pass with very high accuracy. Im sure everything will be fine for intermilan. It's only matter of time until intermilan will be going to the next round.
I mean Atletico is not that weak either. They managed to win against Madrid, didn't they? It would be interesting to watch as a neutral if Madris plays a high defensive line and pressing game instead of sitting deep and waiting for counterattacks with no pressing at all. Based on stats alone it doesn't seem like they love to sit deep this season, which is a good thing for neutral since watching a defensive game can be quite boring[1]. They have a solid xG and a solid goal difference as of now, which means they don't underperform or overperform so far (apart from the goals they scored maybe). CMIIW.
[1]
https://fbref.com/en/squads/db3b9613/2023-2024/matchlogs/all_comps/schedule/Atletico-Madrid-Scores-and-Fixtures-All-Competitions