Well I think I would start by straighten out my cities. Then capture that city you are sieging now. Make peace for invention and all his gold. Abandon the city. Set up to get out of despotism asap.
Many cities are not growing and could with a harbor.
St Pete move pop from lake to irrigated plains to gain a shield.
Utica making troops and no barracks, maybe a market here.
Leptis making a cath at size 2? Needs an aqua, move pop from hill to coast to start growing.
Leptus Minor making a colosseum at size 3 and not growing. Actually no colosseums need be built ever or not till size 14 or so.
And so it goes. You must get out of despotism at the earliest opportunity in any game, with so few exceptions as to be ignored.
Get those troops back to the beachhead and then go for the Mongols as they are close to you. I am guessing you have used your GA with your UU. I am not fond of a despotic GA, unless at least at deity, better just at sid.
One way to avoid it is to not make your UU, so it will not trigger one. At the highest level the wonder triggers are not an issue, but at lower level you have to take care to aviod that.