As far as I'm aware, the base wasn't destroyed because the admins interfered and stopped it. Believe me, with the amount of supplies that was piled up on the base you wouldn't have the chance to scratch it for 2 hours with the amount of ships you brought. Nonetheless, your group were no where near the DPS required to kill a fully supplied core 5 PoB.
Why are we even arguing over this, it was already explained bluntly in the previous thread.