Beetle, why not make an uncommented video and we can give you tips on exactly where you're going wrong?
Sorry, I have no interest in that.
From your write-up, I can see you are ignoring the advice in this thread about not building buildings. In your first 100 turns you build the following, which I didn't: Shrine, Stone Works, Watermill (2x), Stable (3x), Caravansary.
Coach, you have no idea how hard is has been for me to skip the guilds and gardens!
Tried again, not bothering with extra archers since I cannot afford to upgrade them. From about t50 since I apparently was not saving even when I made notes.
tldr; might be okay, hard for me to tell.
Tech: calendar (oops), construction, trapping, horseback riding, philosophy, Education (requires 5 techs, including CS)
Athens: finish archer, worker, library, worker, granary, worker, caravansary, caravan, stone works, watermill, NC, barracks, stable, replacement caravan, caravan, caravan, cb and companion calvary.
Sparta: finish monument, library, watermill, granary, stoneworks, stable, barracks, cb, companion calvary
Corinth: finish monument, granary, rush buy library, stable, barracks, cb, companion calvary
T95 ruin (20 culture, blah).
T110 NC was quite late because I spent gold too early to grade my one archer to CB.
T113 [2] has UU. I will be on defensive for a while, not surprising with two units.
T125 Close out Honor. -10 gpt, no good units to build atm because I sold my horses and iron. Education is still two turns out, I have no idea how folks get that by T105 or so. My army is now 1 CB w/ range, since my warrior was sniped by the UU. 3x CB in the queue.
T129, I now have 5(!) CB and swordsman on line. 3x CC in the queue. -11 gpt, but gold coming in from kills. [4] just took a core city from [2]. Happy at -7, from pillages.
T138, positive happy and gold, but CC are getting killed faster than I can build them. Athens down to 0HP, but think I can kept the melee units off the city.
T142 [1] gets influence, like that will matter. [5] is gone, I missed exactly when that happened. [4] looks to be running away. Barely positive gpt, but honor kills will pay for XB upgrade easy. Nothing but CC in queue, I am starting to keep them alive. [2] has knights, so all her units are an era ahead of me, but I am feeling okay. [2] has pulled back, but I have to wait to XB upgraded before pressing the attack.