You may be correct, but I'm hard pressed to think our representatives failed to act according to this nation's best interests. I'm certain most would have likewise acted according to their own, also. It's the broad brush of government action that the rest of us are subject to. I'm guessing the non action came from want for peaceful relations and less violence. The pitfall of diplomacy and negotiation is that it's slow going and often enough involves compromise. For example, at least in terms of effect and process, you decide you would like to own a Ferrari. So maybe you could steal one quicker than you could earn one, but would that theft justify the means by which it was obtained?
Well, for one thing, when looking at a broad and subjective issue such as "this nation's best interests," there are different and conflicting points of view on that matter.
For the most part, since WW2, our leaders have defined national interests along ideological lines.
Ever since Woodrow Wilson uttered the phrase "to make the world safe for democracy," that's been the cornerstone of U.S. foreign and military policy ever since, up to and including the present day. Of course, it sounds good on the surface, and many people favor democracy. But it clearly addresses an ideological interest, not a bona fide "national" interest, which is something more material, tangible, and strategically practical.
Of course, one could simply observe that both Russia and China were big and powerful - and could threaten us just on that basis alone, regardless of their ideology. That's also more of a national interest concern, not necessarily ideological. However, we chose to make it ideological, but also within the defined parameters of the world treaty system which had zero tolerance for malignant nationalism or aggressive warfare of any kind - at least on paper. Whatever we did for our national interests had to be somewhat muted and even hidden from the public eye, since it would not be politically expedient to reveal the "underside" of national interests. That's why various revelations which came out during the Vietnam War, the Pentagon Papers, Watergate, reports on the underhanded activities of the CIA, NSA, FBI - all came as quite a shock to people and created a great of dissension among the masses.
Did our representatives fail to act for our national interests? When looking at the actions of our government, their public rhetoric, and the overall effect it has had on America's physical well-being and our reputation in the world, one has to really wonder. Their support of numerous non-democratic regimes around the world would indicate that it was never really about supporting democracy. And considering America's faltering and diminished economic and industrial/technological capabilities, one might question whether anything our government has done has been for our practical national interests.
The only thing we have to judge them by is the results and consequences of what they have done and what they have produced. We can look at America's position today and ask the question: Have America's leaders acted in good faith for our national interests?
Or to put it more generally: Is war a necessary evil to achieve some "higher purpose"? If so, what is that purpose? What is the goal?
This brings us to your question about the Ferrari. Of course, there was once a time when war was waged strictly for loot and booty - so that one tribe or clan might enhance and better their own lives at the expense of others. Much of the history of America has been about Europeans pushing across the continent and building up their own lives while tearing down the cultures and nations of other people. To go around stealing and mass murdering like some kind of unruly band of pirates is an atrocity - a crime against humanity.
Of course, we recognize that now, but we still engage in and enable wars to happen, yet behind the premise that it's some kind of "just war" which is necessary and proper. Up to now, the major powers of the world have been able to contain and restrain themselves to the point where it hasn't erupted into WW3 - not yet, anyway. Let's hope it never happens.