What is wrong with the Global Climate Change Architecture?

In his submission before retiring to the private sector, Yvo de Boer sent a warning short, it is impossible to change the climate change architecture from inside the UN.

Does he know something we dont know?  What is wrong with the current architecture? Is it at the Kyoto Protocol level or is it at the “Financing mechanism level”, or is the current framework not able to deliver any depictable positive change?