In fairness, he’s still in office. Hence Americans are more apt to take a harsher view of him than, say, Howard Taft or Calvin Coolidge. (For what it’s worth, go back and look at George W. Bush’s approval ratings today compared to where they used to be five years ago. It’s no secret Americans like presidents a lot better after they leave office).
This is a long way of saying that the president's ugly numbers will almost certainly improve over time after he retires from public life, although just how much remains to be seen. For now, however, he’s more of a “failure” than any of his modern predecessors. And that, of course, is not something to brag about: