What Happens If No Score?

Ok, I have been playing a bunch of games and lately I have had the same thing happen. It goes like this.
Just asking?
Thanks,
JH
- I am building toward something (block of area, terminating a player, winning game, etc)
- I deploy a large block of armies (say over 10, sometimes as high as 30)
- I begin my reigning down of terror of my plan to take X (from the first part)
- I get within one or two territories of taking my goal (and it is always 1 or 2)
- A lone territory with 3 or less guys (usually 1 guy) knocks out my army (usually at a strength of 12 or more)
- Next turn someone turns in cards and cleans me off of the game even though it means they have to stomp over my sometimes 20 or more territories (not all having 1 army)
Just asking?
Thanks,
JH