As someone who voted for him twice and was very excited to do so the first time. He is very meh.
Dropped a lot of his promises, Obamacare, while not being the disaster a lot of people make it out to be isn't the savior for everyone that it should have been. (Single payer is the way to go, plz.) And his record on accountability and protecting whistleblowers is bad. Not to mention all these trade agreements he's trying to push through secretly with no negotiation and no public vote.
He's not a bad president. I'm not happy with him, but I've never been happy with a president. I do think he was handed a lot of shit on his plate at the start and it never stopped coming the entire time he's been in office. So I'll give him some slack there. But he's just not lived up to any of the expectations I, or I expect many people going into his first term had.
He didn't ruin the country... yet... and I'll give him credit for that.
I think the worst thing he's done is that he's been a distraction. While the right has simply been tooth and nail holding him up as "the enemy" and fighting basically anything he's wanted to do no matter how moderate or how reasonable while pushing their own dirty politician stuff quietly, the left has simply stopped fighting and used him as a shield to keep their noses clean while they do their normal dirty politician stuff, also quietly.
Otherwise, meh.
Kinda sad that that's the best I can come up with for how to describe a president. "Meh." But I suppose we've had plenty of meh presidents that didn't leave all that much legacy behind. And Obamacare is... a step in the right direction at least, while not being anywhere near what we need. And taking that first step might be an okay legacy if we keep walking that path.