I've played the tutorial. That was the first thing I did. But no worries, I figured it out now and I think if you take a look at my most recent save, you'll see I've improved slightly! I hope so anyway...
You must admit it was hard to believe after seeing your previous save
I checked your game. Lot's of problems:
- not enough workers. Wayyyyyy not enough workers. I suspect you've been working less than improved land for a big part of the game, thus being one of the reasons you're so backward. To get you an idea, I usually have between 3 and 5 workers (depending on situations) when I have 3 cities. Compare to your 2 workers/6 cities...
- lack of focus. You built buildings, disovered techs and improved lands without knowing what to do with them. A few examples: you have Corn near your first city, need to improve it. What do you need? Agriculture. What do you research? BW, why not, but after follow AH, the wheel, writing and finally agriculture. Should have been the first or second tech, not the fifth! Also, Novgorod is far away from its happy cap. What did you build inside? A collosseum, whose sole purpose is to improve happiness, which is not needed. And finally, you discovered alphabet really early, and it seems you never used it to trade techs. Not trying to use any trick from it, I just used your monopoly on steel and gained 9 techs, a world map and some cash from it. Diplomacy is a very important tool too!
- lack of focus on units: I'm talking about settlers, workers, exploring units and military. 6 cities in 1850AD is small. 2 workers for 6 cities is not enough. Your military is weak. And more than that, you don't know any part of the world except your small island...
I think that's the three main points. I'm not good enough to propose cures, so I'll let the other posters do it.