yeah you don't "defeat" your enemy. When they first mentioned all you had was a Crawler, and when it was destroyed you got a free replacement, I was like "huh...then how does a skirmish end?". Now I realise how...I HATE IT. Seriously what is this? Dawn of War had the OPTIONAL to make the game mode capture and hold for those territories you used to get resources, but annihilation was the main game mode.
They've tried to do a Dawn of War 2, AND FAILED. It's kinda sad tbh, last of the series of kane ruined. I get it if they want to make a fresh new RTS, but don't experiment with C&C 4. Release C&C4 as an improved C&C 3, but same mechanics. Then make a new game Command&Conquer: Tiberium tactics, or something like that.