In 2008 Dean believed the bullshit. I did as well. Then he waged war on wistle-blowers and rolled over for Hollywood when it came time to fight for the Internet.
There are a thousand papercuts that Obama can be legitimately blamed for. He lost the 2006 Congress that I fought like hell for, and for a while there I as a left type guy saw him as sort of floundering and off his direction. Say what you want about the DNC under Dean but they BUILT a party, or at least worked on it, in every state.
All the bad you can say about the guy? He LOOKED Presidential. Minimal scandals, nothing too embarrassing to the country. I'd have loved for him to go after Wall Street after the 2007 crash, sure. And he and Clinton cracked down HARD on Occupy that nobody seems to remember for some reason.
Obama will go down as better than average. Not Great, not bad, not average either. But man, the Dems have a shit ton of rebuilding to do before we lose the country for a generation.