Yes, Milan are still unlucky in this match, Milan had a chance to score through Kessi and Ibrahimovic in the last 10 minutes to equalize the score, but they still failed . However, Milan has shown a good performance in this match. Now Milan can focus on Serie-A, hopefully Serie-A or Copa Italia is one of the titles that Milan can get this season.
Milan do play good enough in Champions League but results do not support them. Anyway, think positively for their future, I think they have good first Champions League season after many years. Good enough for further growth in next years.
Additionally, this defeat causes to a stop in both Champions League and Europa League. Milan even can not get a ticket to be delegated to Europa League. It is good for them to fight with 100% resources in Serie A.
Atletico was quite surprising, even though I expected Atletico to win, but the 3 goals they scored against Porto was surprised me. Because I don't think Atletico will scored more than 2 goals.
In the end, two best clubs go next and it is good because we will have more competitive matches in later rounds. Congrats to Liverpool and Atletico Madrid.