I see Obama as a very good president that was faced with a strong recession (caused by Bush Jr) and a Senate and House that were full of racist people that worked against Obama every step of the way, simply because of his skin color.
I first became aware of politics and of our presidents, back in the late 50's when I was a teenager. There have been 11 presidents after JFK, Among those 12 presidents, JFK was my #1 and Obama was my #2. Dropping off from there, I see Bush Sr, Ronald Reagan and Bill Clinton as the other 3 that were a positive.
Lyndon B, Johnson, Ford, and Biden were non-events
And Carter, Nixon and Bush Jr. were disasters and I now put Trump in this category as well.
By the way, presidential historians agree with me mostly, meaning I am not the only one that thinks like this!