Shit happens. Inter is king in Seria A this season, but not in UCL, because UCL is for champions from various leagues in which every club is very strong. This is why you will see that a club can be strong in his domestic league, but will not be able to go far in UCL. So many clubs like that.
Last season, maybe Inter was one of the most unexpected clubs in the UCL because they were able to reach the final round, but had to lose to Man City, and this made sense. For this reason, Inter's hopes are much greater this season so that they can return to the next round. However, their steps had to stop in the 16th round. Yes, take the lesson, that now they have to focus more on Serie A. In Serie A, they actually have no opponents. Because the distance between the points and the clubs in the lower ranks is quite far. So, Inter has great certainty to win the Serie A cup this time. They will take over Napoli's position as trophy holders last season.