Earlier quoted context omitted.
I don't really understand the nobel peace prize, or specifically why Obama was awarded it. I understand being the first black president of the United States is a big deal, but did he personally do anything to promote peace? Or does being black in the white house somehow lower racism, hence promoting world peace?
He was awarded the prize in the hope of influencing him to actually promote peace in the future. The idea was that accepting the peace prize would have led Obama to see himself as a Nobel peace prize winner, and thus as someone promoting peace, and that he thus would subconsciously actually try to promote peace to avoid the cognitive dissonance. It didn't work as well as it could, but maybe it worked to some extent.
He has brought international relations to a new low.
Quite a bit of it isn't directly his fault, but he has done little to improve the situation.