As I said in the first spoiler, the beginning of my game went as well as I hoped for. After that...my warmongering turned into a disaster.
I continued peacefully expanding for a long while. I built the Colossus, was beaten to the Mausoleum, but completed the Hanging Garden, the Taj Mahal, and the University of Sankore. I was first to liberalism, taking nationalism as my bonus tech. I was a little slow in my expansion into the jungle to the north, so Cyrus settled one city among mine, there. I adopted theocracy, preparing for my Janissaries to take the disputed land and push north from there.
I declared war against Cyrus in 1410, when I was the only Confucian, while Cyrus and Sury were both Jewish and friendly with each other. ZY immediately declared war against me. I captured the two Persian cities that were my immediate objectives and paid some gold for peace with ZY, when Sury attacked me in 1575. I pay him a tech for peace, take one more city from Cyrus and make peace with him in 1620. Too much war weariness and too many enemy units facing me to press the attack.
Sury has the AP and I have to defy a series of votes to give back the cities I've captured. But I haven't had enough. I attack Cyrus again in 1710. This time Shaka takes advantage of the situation to attack me, so I give a tech to ZY to declare against Shaka. Then Cyrus volunteers to become Sury's vassal, bringing Sury into the war against me, again. I sign a ceasefire with Shaka, then agree to an AP vote to end the war with Sury/Cyrus.
Now I realize I can't win militarily, so I'll try for space, even though I've lost my tech lead over the course these wars. I continue defying votes to return cities. I'm beaten to a couple more wonders, but I do get Mining, Inc. Too bad I don't have enough metals to make this particularly advantageous. And then, in 1868, there's a random event about an Ottoman infiltrator being discovered in the Khmer government, which automatically makes me declare war again against Sury/Cyrus again!
I give ZY another tech to become my ally in the war, but the enemy have far too many units for me to resist. I give Sury one of my smaller border cities for peace in 1892.
I continue the space race, although I know I can't catch up to Sury, particularly after he completes the Space Elevator. Sury launches his space ship in 1948, long before I'm close finishing mine (I even lost a docking bay along the way to an enemy spy). And then, while waiting for his space ship to reach its destination, Sury/Cyrus declare war on me again, in a cheap, vicious maneuver to run up his score, exactly as I've done, myself, in past games.

He captures two of my cities, including one by a massive paratroop drop, before he wins a space victory in 1959.
I was frustrated with this outcome, so for fun I replayed the game from my 1 AD save. Among the differences in strategy this time was building the AP, just to block Sury from getting it, expanding to the north faster, and switching to Free Religion to decrease my negative diplomatic points. I delay war for much longer, while I built my economy and extended my tech lead. Cyrus and Sury sign a defensive pact, while I sign one with ZY. When I finally attacked Sury/Cyrus in 1765, I make a tactical mistake by giving ZY a tech to DOW vs. Sury (forgetting that their defensive pact ended the moment I attacked, so Cyrus remains at peace with ZY). This works out fine, though, when I make peace with Sury in 1804; now I can watch all of his units march by to fight with ZY while I deal with Cyrus.
Cyrus capitulated in 1842. The rest capitulated easily after that: Sury in 1870, Saladin in 1892, Shaka in 1896, and Sitting Bull in 1903. Rather than attack my friend ZY, I take a diplomatic victory with a UN vote in 1905. So it was possible. Just not the first time.