Although I didn't vote for Obama because he was too liberal and socialist and inexperienced, I thought it was great that a black man became President. I felt very proud of my country. We could finally put to rest our slavery past, the Civil War, and move on to a more integrated society where race would no longer be an arguing point. Unfortunately, President Obama used race to divide people for political advantage. He aggravated race relations rather than ameliorate them. He did the same with gender, social class, rich against poor, all acting to divide Americans into sub-groups for votes.
His Justice Department's non-action against anyone in Wall Street and bankers who criminally violated laws that helped cause the recession was appreciated with the Fed subsequently giving them billions to buy Treasuries to recover their wealth which they have done and are now richer than they were before. The rest of us regular people got crap. Wall Street and the bankers showed their appreciation when he left office by paying him $400,000 for a speech. Of course this is also a "wink and nod" to all future politicians that they too will be taken care of if they treat banks and Wall Street as well as Obama did.
His fecklessness and weakness on the international stage created adversaries who did not fear us and allies who could no longer trust us. ISIS, Syria, Iraq, Afghanistan, Russia's taking over the Crimea and parts of the Ukraine, Georgia, China's militarizing the South China Sea islands, North Korean atom bomb, Iraq and Libya falling apart, refugees creating problems in Europe, Australia looking to China fearing America no longer would be there for her, ditto Saudia Arabia looking to Russia, etc. Fortunately Trump is turning that around.
He added $10 trillion to our debt (doubling it) to get a very weak recovery. He selected Fed chairs that printed over $4 trillion dollars inflating the dollar and keeping interests rates at zero which is has created new bubbles in real estate and has inflated the stock market. Trump may try, but I don't think he'll be able to reverse the damage.