If this administration had only failed in one or two areas or even in parts of them, it would not be deemed as the failure that it has been. I say 'administration' because it wasn't just Bush even though he was the President.
For instance, let us set aside the latest economic fiasco (which like it or not has been building for quite a while), the Bush II administration still has charged a war on the equivilent of its credit cards. There was no tax increase to pay for this folly. If you give a dance you gotta pay the band.
Then the economy fell apart.
The Administration went to war with Iraq on false pretenses and has caused the US to lose so much credibility abroad as to be ridiculous.
No other US President, Vice President or Defense Secretary has been considered for trial on war crimes. They may not be able to travel abroad except to like Saudi Arabia, for the rest of their lives for fear of arrest. This isn't my opinion, but that of the world. People do not like the idea of torture.
The situation has been made grave by so many situations in so many areas of US policy.
I lived through LBJ, Nixon, Ford, Carter and Reagan and they all had successes in some areas to go with monumental failures in others. The successes of this administration are few. Too few.
Defending this administration is defending the indefensible.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher