This is the one quote attributed to Sullenberger. Is that enough to claim that he "slams" Boeing? Headline hyperbole is annoying.
The full remarks from which this quote is lifted are significantly critical of Boeing, during which he describes the "current system of aircraft certification and design" as having "failed us". I don't think this headline mistakes the the nature of his remarks at all.
Sully is not given to hyperbole. When he says "not even close" you can take it as given. He doesn't need to say, "shame on them!" But you know, and he knows you know.
On the other side, I would never click on a headline like this from another source, but it being here on HN provides some benefit of the doubt. Yahoo news reveals its consistent character, as usual, but at least this is balanced by the always insightful comments toward the material subject matter of the article (my own comment here notwithstanding).