Michael had achieved his goals first and foremost, everything seemed to go according to plan. He'd defeated the pesky Winchester brother's and was now ready to finally cleanse this terrible planet of its sin, to get rid of the scum that Chuck had created on a whim. You'd proven yourself to be a loyal companion, at least until you disappeared from the face of the earth without a trace. When you finally showed up again, your body was disfigured by wounds and you were robbed of your grace.