I don't think anybody is trying to pin all the blame on Ruddy. I've seen (deserved) criticism on here for the unspectacular-of-late Martin Olsson, penalty villian Russell Martin and believe me Whittaker is getting his fair share of blame from Norwich fans.
Of course, the midfielders (albeit there were only 2 of them in the 2nd half against Boro) and strikers are also partially responsible but the point of this thread was that John Ruddy this season has been a long way from the John Ruddy we had under Lambert; a sentiment which I completely agree with.
I think we need to move on from keep refering back to the Lambert era. Ruddy was one of the few players that played well under Hughton. I agree that he hasn't been at his best this season, but to be fair we haven't lost any points due to his perfomances and I would say that he has kept us form losing points.