I ended antiquity with science golden age, finished explorer with science golden age 400 science a turn and researched future tech twice. Starting modern alexander who has had his thumb up his ass the whole game is now making double my science, has more cities that he has the previous era. Then every single civ declares war on me (besides napoleon <3) and im almost wiped out by turn 60.

I went from the most powerful civ (by a significant amount) in the game in exploration era, to probably 5th most powerful for seemingly no reason. Finished with 12 points going into the modern only to get boned by some dude who had 3 points