Why has the combat-AI become so much worse since SF?

[Darkrenown]

Had a dad is right. It is so, that if the Ai has the right amount of units, it acts like quite different.

But that's unrelated to the OP's issue, the AI building a bit more air units etc. isn't going to change their performance in the Gotterdammenrung scenario, certainly not for the first year or so and likely not even then since the already build units make up so great a % of the OOBs.