You get fired the moment you launch this map with the reason "Your opponent has completed mission objectives."

Ahh I see the issue. I have fixed Central City, it is pointing at the City Hall now. So you have to deliver passengers to City hall now. Should be working correctly.

Well, I mentioned it not because of anything historic, or game balance etc.. But because there is a task to deliver passengers to Central City that is impossible to complete. Probably removing the mine has caused some error. In short, I played it, did everything else, but this broken task meant I couldn't "finish" the map. Removing the task is probably the way to go.

I originally had a mine in central city, for Iron... during test playing this made it pretty easy to make the steel you need. So I removed it. Guess I could have changed it to a coal mine.... Central city did have some small mines, but now is a gambling destination.. so.... I was on the fence on what to do with it. So no. not an oversight per se.. but probably not the best scenario design....

The map looks nice. But there seems to be a problem with the task for Central City. Maybe a Mine is missing there?