I think the Auba situation really hurt us, though, he had lost his spark playing for us and looks a new player at Barca.You give us more praise than your mate haha.
Not buying anyone in Jan has done you in IMO.
Arteta has definitely given the club an identity back to an extent (so far), but as I have said, his squad depth and management is what hurt him.
AMN should never have been let go, and like you said, we should have dipped into the window in Jan. I am sure there players playing for lesser clubs who we could have signed without issue.