There's no one to blame because companies aren't obligated to expand beyond what they feel that they're capable of sustaining. Why do you expect there to be any blame to apportion out in the first place?
Not having a physical branch really isn't any kind of excuse for the kinda treatment we get from Atlus since a couple years.
If you cant distribute yourself, you can still make partnership in time (meaning before actually releasing the game in the US) to go through the lockchecks and whatnot simultany in the US and EU (with your partner).
Or actually doing it yourself, like NISA is doing (without a EU branch). If NISA can do it, and they have comparable size, resources and target audience (I'd even say NISA sells less than Atlus), then there is absolutely no sound reason why Atlus couldn't do this. But as I said, at the very least they could actually plan the EU release before the US release is over, which seems to rarely be the case, and yeah, that is their fault, EU branch or not.
Thry showed with PQ that they can have a very decent turnarount, and given Hardin already talked about Europe lets me be optimistic.