Well, yes. He himself once stated that he'd rather be a great one-term President than a mediocre two-term President.
This is where the anger from within Obama's own base stems from. He ran on a platform of change, and combined with his attitude during his first election, the message we got was "I'll do what it takes, screw the political costs to myself."
That's not what he's been doing since his presidency began. Notice that the words "Yes we can" are not part of his re-election schpiel, and probably won't return. He was an idealist and now like all politicians who enter Washington, he's a realist, who puts more stock in the protection of powerful interests in the US than what voters want, which is more freaking financial and legislative equality in this country. We're sick of hearing about how the U.S. Treasury, our treasury, is in the shitter while the "drivers" of the economy post record-breaking profits every year. How the fuck does that work out, and when the fuck are we going to elect a president that cares about it as much as we do?
So yeah. The guy we elected has become part of the problem, and while it's not necessarily good to judge any (potential) 2-term president's legacy just on their first term.....what Democrats worry about now is that, if we re-elect Obama, rather than making real changes in his second term like we expect re-elected presidents to do, he'll just use another 4 years to continue serving the interests of business leaders. I have little hope of a 2nd term turn around from Obama, where he starts acting like talks because he's no longer worried about currying favor.
Ideally, for me, he would just act in his second term. No polemics. No long-winded speeches to the American people. He acts swiftly and decisively with presidential authority on the top issues we're facing. No more late-night talk shows. No more fucking golf outings. No more fucking globe-trotting. No more press articles about what his fucking wife wears. No more of this playboy image that he's not only failed to reject, he's cultivated the whole time. He's not JFK, not even fucking close, because JFK opposed the establishment that was throttling the life out of this country, while Obama has done nothing but work with them to maintain their control.