Let's take a brief look at some of what he's "inherited": a war he said he'd be pulling us out of within a year, those gas prices that were declining at $3, that terrible unemployment rate somewhere below 10%, "welfare" that lasted for less than 7 years, a somewhat affordable private health care industry, job growth, states that weren't bankrupt, a system that didn't spend $300k to "save" each $25k job, and, of course, 2/3 the existing national debt.
Now, let's take a brief look at reality: thiss guy has not only failed to deliver either deliberately (ie: through lying) or inadvertantly (ie: through being a fucking dumbass) on every single thing he he said, but also every single domestic and foreign decision he has made.
If you are unable to realize at this point that Obama is one of the worst, if not the worst, president in the history of the US, then I think arguing with you is a pointless endeavor, because you're far dumber than even Obama would have expected you to be.