What I learned is each player has skill level associated with game survival. What makes you resign?
I had one game where I had two inexperienced players on my team, playing three players I have known for a year or so. My team was leading in score and I had won the sea (Medit Reveal High Resources settings). In early Bronze my partners said they were fine, then within two minutes both had resigned without saying anything. I told my opponents that they weren't nice to my partners, then asked what they did. Each of my partner resigned when a handful of Chariot Archers found their woodies.
Several games last week I would be able to have a small Bronze army (5-10) units kill all of the opponent's villagers. They wouldn't run or build any military buildings, just say "GG" and resign.
I personally have set lofty goals for myself. If I lose, I want to have at least 200 losses. This means that I have fought a good fight. Some games I have played lately have had a Loss TTL of less than 100 for 6 players combined when the game ended!
The "expert" games I play in typically have fighting in Tool, Bronze, and Iron. Sometimes even in Stone. These experts aren't gonna give an opponent an easy win with just making a handful or two units. These wins will have to be earned by fighting through all of the Ages, use effective counter units, and have scattered economies used throughout the game. These players have techniques and skills to survive/avoid archers in their woodies.
Do you have any personal goals for survival? When do you consider yourself beat? What techniques do you use to keep your economies alive and producing?
Can you survive the Blitzkrieg?