Bad attrition.
At 10 minutes in you had:
2,3k worth of army vs 6k
The score was 4,4k vs 6,8k (You had an attrition rate of 64%)
By 13 minutes you were
material outed at only 1,5k army vs 9,5k. There were several fights you committed the wrong units to:
- Redback vs felon ball at 7 minutes or so instead of pulling away and using it to defend recluses.
- Sending venoms into ball instead of guard commanding your recluses. (G + alt click drag)
You simply didn't have enough army or enough army in one place to do much because of your previous losses.