Additional Comments:
I don't know how much you know about the other civilizations and their units but it isn't enough. Your opponent may or may not have had as many resources as you have but he knew how to use them. They created alot of camelry units and they did so for a reason. Camelry are very effective against your calvery. Then they made advancements to their camelry. At one point, you where fighting their champion camelry with medium calvery. You lost a lost of units and wasted alot of resources. You should have started creating infantry to fight the camelry and if you had, the game may have turned around but camelry will always defeat calvery.