Although finishing on the losing side, being second on a continent with the Boers is no bad thing. I’m glad Ethiopia have been ranked as high as #14, as their performance certainly warranted it. After crushing the Ayyubids and Carthage in quick succession, they showed some true AI genius by convincing the Boers to join their war against Arabia: knowing their neighbours would get nothing for themselves, knowing the warmonger penalty would not count against them, and knowing it would actually strengthen their relationship!
Their ultimate loss to the Boers was devastating, but they probably struck at the best time available to them. A 1% chance of victory at that time was better than a 0% chance of victory later on.