Evidently energy was created, or it would not exist, would it ? It probably can be destroyed back to the pre-energy state in some way, just not on a scale we comprehend or even care about.

I suppose we're like bubbles on a boiling pot of water when the fire stops: all this agitation spreads out on the entire volume, and sure no energy was lost, but there are so little bubbles and so much water, once the heat has spread out entirely, the whole volume of water looks pretty dead.