I was simply saying that he shares a large portion of the blame. The people who make the final tackle/screwup aren't always the people most to blame for the goal, which is why I think the first goal is as much Cuellar's fault, for not cutting out that ball, as it was Dunne's. Still, you can't just ignore that it was Hutton's terrible decision making that turned over possession in that instance.
Second goal, Hutton shares primary responsibility with Dunne or Warnock, take your pick. The defence is occasionally going to have to deal with goalmouth scrambles, so clearances can't be as brainless as that. No one would question that it was a bad clearance if it had cleared Walcott and just gone back into danger (likely).
Third goal, Hutton all over. If you have a RB actually doing his job in that position you don't get strikers crapping themselves and feeling like the defence rests on them.
I agree with you that Bent, Gabby, etc stank in the second half, but it's not as if Hutton's bad play happens in isolation. In one of Arsenal's more toothless passages I remember seeing him needlessly close down an angle that nobody cared about, when Ireland was hassling a player on the halfway line. As a result, Hutton lost the player behind him (his responsibility) and so Cuellar had to drift out and pick him up. All needless, because Hutton's change in position was utterly pointless. No need to go into the shocking tackles, handballs and mostly non-existent attacking play he's been responsible to date.