“The Court acknowledges Plaintiffs’ frustration with what they perceive as Congress’ inaction in this area...”
You're correct. The court is not saying that "We agree" because they agree that Kerchner and Appuzo "are frustrated," and just to say yeah we see you are frustrated, which I think as silly. Of course they are. That's why they filed suit. The court is acknowledging that they are frustrated at the system that has failed to properly vet Obama. The court in a rare moment of candidness, agree that Congress, the lame press, and whoever else has failed at vetting Obama.
The 3rd Circuit didn’t say “we agree” that the plaintiff is frustrated.
They said “We agree with the District Court’s ruling on page 483” that the plaintiffs do not have an “injury in fact” because their grievances are of a general nature and more appropriately addressed by the legislative branch.