Main issue was Mkhitaryan not existing and Darmian, despite being more than solid, isn't the kind of player that will alleviate pressure from Barella.
Even Hakan was trapped for most of the first half and people are raving about him. Rightfully.
We had no presence in the middle of the pitch for like 50 out of 60 minutes till Brozovic came on.
Barella was also used higher up and wide to cause tension to Porto's slow defense because our strikers aren't exactly fast, so he had to receive the ball in awkward - for him - positions and then he was isolated. Should have done better at times, was objectively poor, but I wouldn't put that on bad attitude.
It's just that kind of game. Porto came to stop our midfield from functioning and did pretty well to achieve that. I've never seen Inter throw so many long balls under Inzaghi to the forwards as I've seen in the first half.