I think we would all agree that Obama was the biggest piece of shit President this country ever had. A disaster for the country and as first class asshole.
All the Republicans in the House and Senate knew that, however, they did not disrespect the Office of the President by not allowing him to have a SOTU address even thought it must have made them sick to listen to his lies and hatred.
I think he was a craptastic President, but I don't know if I'd go so far as to say he was the worst, if only because he has a lot of competition.
His competition for being the worst would have been Slick Willy, LBJ and that asshole FDR.
Not much of a historian, I take it.
Policywise, Clinton comes out slightly better than Obama, although I think Obama was less embarrassing. Granted, LBJ and FDR were disasters. But let's not forget Carter. Nice man, absymal President. I'm old enough to remember gas lines and the Iran Hostage Crisis and "malaise". And how about Herbert Hoover, who - while technically a Republican - actually initiated many of the programs FDR continued and expanded on which exacerbated the Depression? Or either Grant or Harding, who each presided over incredibly scandal-ridden administrations? Or Buchanan, who proudly made the Dred Scott decision the centerpiece of his administration? Or Andrew Jackson, the first President to ever be impeached and a virulent racist? For that matter, I can name several Presidents who were openly racist (as opposed to the Dem hallucinations of Trump's "racism" now), and who made policy based on it.