Wouldn't feel bad, you're not the only one. Me included... 

@Formivore. In hindsight, I concur about more cities. The coastal pearls spot was free for some time in my game and I would have grabbed it if not for the Culture VC. A big advantage of doing this only dawned on me when I researched Navigation:- a couple of triremes upgraded to frigates would have been extremely handy. My simplistic (and perhaps incorrect) view on city number is that:- if it gives more than 10% of your total culture (assuming you have the relevant Liberty policy), then there is a net gain in policy accrual. My problem was largely one of growth and a lack of citzens to work Landmarks.
Game: Civ5 GOTM 26
Date submitted: 2012-01-12
Reference number: 25504
Game status: Diplomacy Victory
Game date: 1938AD
Turns played: 239
Base score: 1306
Final score: 1813
Time played: 2:34:00
I'm returning to GotM after a hiatus. Gambled and moved my settler north and ended up settling on the coast, which gave me the observatory bonus, but also created chronic early-game happiness issues without the wine. Ended up with 5 cities, although I didn't settle them as quickly as I'd have liked b/c of happiness...no wars. Quick games are fun! Good map!
lol, quit in turn 47. my first try at deity. my 3rd or 4th try with France for culture vic.
i knew war was inevitable so went completely with units. i had 6: 3 spear, 2 warriors, scout and China brought 5 units at my border (1 warrior, 2 spearman, 2 chariot archers) and i knew a DoW would be the next turn. I figured if i DoW, i'd get the upper hand by attacking first so I did. I had a good defensive position and used 5 of my 6 guys (scout was a move away). I brought 2 of their units to 1 hp (only 1 unit did more than 1 dmg) including a shot from Paris. The next turn, both of those units healed to full. all units counterattacked after a general came into vision and killed 3 of my units in one turn.
that's pretty much game over. all i had left was a wounded spear and warrior, a scout and China had every one of their units. Worst. combat rolls. evar.
so eff that game. i might try again, but geez, how am i supposed to survive that?