I don't see how it's possible to construe it that way. He allowed it to be a "tax", which the O administration had claimed it was not.
It was one of the most bent and tortured political opinions of all time that he appears to have changed to believing at the last minute.
He could have destroyed it with one vote. He didn't. He tortured this country for eight years with an insurance company debacle that hurt far more people, companies, and medical care than it helped.
Secondly, Roberts was right on target in one of his public comments after the ruling: Its not the job of the U.S. Supreme Court to fix a stupid law. Thats the job of Congress.