By Daniel Bates Mike Greenberg knows exactly how hard it can be to be a Jets fan. And even before Sunday’s miraculous win in Cleveland, the ESPN anchor believed there was hope. Tweeting: “For the Jets, this season is gonna be about showing improvement. They did that today. And there is a lot of room to get better. Frustrating to lose, of course, but today was a step in the right direction.” Fans hopped in the comments to let Greeny know it’s never over until it’s over. “Apologize to Saleh.” “This didn’t age all that well…” replied Mike Lupica. “What an idiot this guy is!” Greenberg said. “Shut…