Yeah, this would have been an easy win for Inter if not for Muslera. Also, Eto'o shouldn't have missed that chance when he had an open goal in front of him.
Inter were the (much) better team out there, but who cares. Few more defeats like this when they're the better team and they still lose, and they start losing confidence.
Just like in CL, they'll again become in serie A the losers they used to be.