I think there were a few too many variables just to say the teams were unbalanced. The field itself isn't symmetric, so with only one half down, you can't discount that impact. Also, how do you account for strategy before the battle begins. Even if you split the teams exactly down the middle and had 100 vs 100 of equal skill and weapon load-outs, you could still have one team with a serious advantage over the other. And if it comes down to making it 50 vs 150, that would compound some disadvantage in just being able to cover the area that we had to work with.
If your only take away from four hours of fighting is that your team came up with less overall points, I think you might be missing out on a lot of what Dagorhir offers. There were too many valiant last stands to eek out a few more points, and too many heroic charges to break the enemy's line, to roll up into just a number.
I was on the red team, who carried the day in the end, but there were only a couple times while holding the enemy castle that I really felt we had the upper hand. I was pushed off capture points multiple times by superior blue forces. I saw the battles for the choke points near the pond go back and forth depending on which team had a valkyrie near or who brought in reinforcements. On multiple attempts to take the graveyard point, we were repelled. Each of these minor events are opportunities to have fun in the game. Don't let the final score dictate the satisfaction you have from a good day of fighting.
Now, don't get me wrong, I like winning and trying to attain a goal and probably would voice some disgruntled remarks if on the other side of the coin, but even so, reflecting back on the moments that made up the day, I'd have to think that I got more enjoyment from it than not.