Fine, let's go with basic damage dealt. In your last war, you dealt 3 million NS to NSO while receiving 1.5 million in return.
So, by that metric, you've been half as effective this war as the last, as your previous 2:1 ratio has turned into a 1:1 ratio. And, of course, a 1:1 ratio when you've fired a lot more nukes and had a lot more wars per capita is actually pretty terrible.