First stategical mistake, when your towerguards took the second warg lair you were supposed to go attack inmediatly. To gain time (you remove the option to rush from ur enemy) and take down his spider pit which he had just built at that moment... and particulary in a hard to defend place. If goblin archers intimidated you, you should have bought inmediatly banners, use shield wall to make 1 minute of time untill your own gondor archers came. And there u win the game bra.
But no, instead of this, you went back to take another warg lair... you greedy cunt. And worst, use gondor archers to defend. Nah nah