As always with recent Arsenal vintages under Wenger, you see many good things that give you hope, and enough bad things to ensure your conviction that we can't win anything as long as the bad things are not addressed. We do give the ball away too much, especially when pressed, certainly more than our talent suggests we should. However that is also partly a product of how we play, and how wonderfully we can play at times.
The problem is that playing that way with both wing backs pushed forward and one of your two central midfielders frequently ahead of the striker leaves you wide open to counter attacking football. The killer third goal shows why this team won't challenge for the league. And yet the manager absolutely refuses to acknowledge the weakness and address it.