Any system as large and complicated as this one will have failures. Our job is to learn from the past and try to prevent it from happening again in the future.
We are not talking about a movie maker delivering a boring scene who will try to do better in the next movie. We're talking about toppling foreign governments, invading countries, backing or installing dictatures, assassinating people, droning teenagers, dealing cocaine, torturing people, launching nuclear weapons. Doing it times and times over, never being shy about it, and never admitting any wrong.
There is zero structure of improvement in the US government behavior. Those structure exists, for example the Geneva treaty, the Rome treaty which brings trial for war criminals, but the US government refuses any accountability. There is no downside to the erratic US behavior.
I have reason to hope that things CAN change and in fact, ARE changing. Look how rapidly gay marriage has gone from an impossibility to soon being the law of the land in an incredibly short amount of time. Pot legalization is happening at the same speed. The next great wave will be atheism. These things are happening because of increased communication and awareness due to our newfound interconnectivity. That is only going to increase.
Soon it will be extremely hard to keep secrets at all, a condition that is essential to these atrocities continuing.
In fact, that's what the authors of the Constitution were trying to do...
Doesn't seem to be working with Guantanamo. Or invading other countries.