Sixteen years of what he tried to destroy in America has created an end to his own legacy. Remember when he said, "You didn't build that."? He was never a builder/creator. He has always been a destroyer trying to destroy what he and his supporters hated in America, and all he managed to do was destroy himself and his supporters.
Trump on the other hand is a builder/creator and will have a true legacy that of which the stuff of legends is made of and will endure for ages until the end of days comes and no one will be alive to tell stories anymore.
Obama's hatred for America and it's history fueled him. His passive-aggressiveness propelled him. His intellectual deceptions and shadow government gave him cover. But nothing lasts forever. All these anti-virtues blinded Obama as he created only one thing around him. Darkness. Next year will be the 17th year. By next year, year 17, he will be like what he created. A dark distant memory. A memory much like a nightmare.
He's finished. It's over.