"Why me? Why did the financial collapse have to happen on my watch" - George W. Bush.
This man doesn't understand that he was responsible for the economy as the president. He was suppose to make sure there was sufficient regulation of markets and monitoring. Even if one argues that the whole mess was unexpected, his handling of the situation was highly reactive. From the start of the crisis, he preferred stand was to do nothing and let everything run its course. Initially when the subprime mess emerged, his immediate response was that people should not be bailed out....rather than examing the situation and do what needs to be done to mitigate it. At the critical juncture when Lehman was about to go down, he applied ideology again "no bailout!" he insisted without spending time to understand the implications of Lehman going down - at that time Lehman required $30B to rescue and AIG $30B. The collapse of Lehman set of a chain reaction within days AIG's rescue ballooned to $80B and they had to go to congress for $750B of TARP to bailout the entire system. Most market participants knew that Lehman was highly interconnected and letting it fail could be potentially disastrous.
It was not bad luck that made this guy one of the worst presidents in history. It was bad leadership. He could have done infinitely better if he had just gotten all the facts, listened carefully to expert opinion and their recommendations on what to do.