Noam Scheiber pinpoints why the press has turned on Ryan:

You can treat politics like a game, and you can assume reporters will, too. But you can’t go so far as to admit it’s a game. … The problem with Ryan’s new budget—in which he reverts to his pre-campaign position on Medicare cuts—is that it more or less concedes the whole campaign, with its righteous defense of Medicare, was a charade. Among the Washington press corps, this is a major no-no. Depending on the circumstances, reporters may be happy to enable these reinventions, but they are loath to acknowledge their role in them. Ryan basically rubbed their noses in it.

Earlier Dish on Ryan’s new budget here.