> Germany's economic output didn't shrink nearly as much as its energy usage did.

So the demand destruction happened in the most energy intensive and lowest value-added sectors, which make up less than 100% of the economy. That's what I would expect, it's not a contradiction. If a hawk eats the slowest lizard, the lizard population gets faster -- but not because any individual lizard got faster.

I hope your conclusion is correct, but your reasoning around the alternative hypothesis isn't.