Well, one thing is clear: you're actually doing well in the tech departement. Even if I think you could do much better.
Some things that I saw:
- you play on a huge map with only 6 opponents. You are actually at 80% science and are organised. This means that you have both plenty of space and the economic backup to expand, what you should be doing. I fear that your opponents will do this better than you, making them surpass you in a few centuries. I can be wrong, but I'm not sure.
- you have no labor civic, no religion, and no religious civic; any reason?
- yuou seem to hav neglected your diplo. You basically have no friends actually. In your actual position it's perhaps ok, but it wont be in other games, or perhaps in the future of this one.
- your tech path: you made really strange choices. If I'm not wrong: archery (try to get strategic ressources more than bows), animal husbandry (good, it opens your UU, but you did not exploit it), fishing (you never used it), mysticism, meditation, priesthood (pursuing oracle, why not; I did not notice if you had marble), mining (much have been waaaaaay before, considering the awful lot of forests you had in your capital; you needed Bronze Working quickly), the Wheel (opens UU, but too late I fear), pottery (you're financial, it should have been a higher priority), monarchy from oracle (why not, but considering you are organised, I would have taken CoL), BW (cf before), writing, aesthetics (pursuing the great library?)... I will not continue from here because it's hard to tell anything.
- you seem to have forgotten about specializing your cities; or perhaps you don't know about it?
- you're working unimproved tiles: bad! bad! bad! I did not notice if you have enough workers
- compared to the other AI, you're a little bit boxed in; why not have planed to erase Ramses from the face of the earth, considering you have one of the best early UU of the game?
- building chitchen itza: considered by lots of fanatics to be the worst wonder of the game. I can't deny this fact I must say; cf specialization
Otherwise, you don't seem to have a plan; do you know which victory condition you are pursuing? At this point, you should know imho