He wasn't protecting the lead, he was screaming "we need to score the second goal" the entire game. We just have no physical or mental strength right now to hold up for 90 minutes.
All the things that were working in the first half stopped in the second. Milan were much tighter and more aggressive, they pushed us back and our outlets in Dybala, Cuadrado and Morata could not do what they did first 45 minutes.
Much work and much improvement is ahead of us.
But if we don't win both upcoming games the season is already over, no way we're coming back from that.