Rohandar, I'd say you lost because you went for tech 2 naval factory so early. The resources alone for upgrading and making the T2 destroyer likely made you lose the land battle. Always make 1-3 subs first IMO.
Also towards the end you had one of your T2 engineers building T2 extractors on the front lines. Accidents happen.
thanks for the comment. I thought his naval yard was pretty smart. I was forced to hastly build a yard myself, together with slow, expensive and weak subs i was pretty afraid lol. Should have spotted his T2 naval earlier though, probably when it still was T1, agreed.