"Obama was one of our better presidents"
I don't understand where this sentiment comes from. He was a care taker president, and frankly a very divisive one.
The right gives him a lot of hate, but realistically Obama did not do much earn, just as he did little to earn any of the accolades he gets. He continued and expanded foreign conflicts he in inherited. He continued the recovery strategy and policy choices chosen by the out going Bush administration.
His signature health package is a completely failure on all fronts as far as the original stated objectives especially the top lines around cost control, universal coverage, and keeping plans broadly similar in terms of coverage and cost for those who already had them. You can say the legislation that got passed was watered down and what not but he signed as enacted so you can't give him pass.
He really started the identitarian political style that has taken hold today. Sure it was little longer form than the "meme wars" we get today but everything the man said tried to cross cut America by race, class, or some group like making gay marriage an issue etc. Don't forget the complete normalization personal insults in modern politics (or the return to Jacksonian politics however you view it) began with him as well "Bitter Clingers", "your brothers keeper", "you didn't build that", anyone? The line from Obama -> The worst of Donald Trump's behavior is pretty direct one.
Next you have to consider just exactly how Trump 1.0 got elected, he did by animating not just a lot of generally non-participatory voters, but one that nominally would have been Democrats. I still say policy-wise Obama and the legislative leadership of the period were lightweights but non the less whatever they did or did not do between 2008 - 2015 left enough American's feeling left behind they bolted from progressives to a GOP platform with a little populism injected in, hardly an endorsement for a two term president who enjoyed his own party controlling at least one legislative body throughout most of it.
In all seriousness take away the title 'first black president' and ask yourself would anyone anywhere along the political spectrum still consider the man remarkable? I think the answer is without that the man is a foot note.