Lorch assault, everyone is distracted mid, I take a sneaky side road and get up to a mortar cluster that is firing, boom 100 munitions gone. Max range jackson shot pinpoint instakill as I sneak up to an ambulance and major a blob is retreated to. It is just they are so slow and they get caught by the slighest thing if they leave stealth for even an instant.
As simple as that: You learnt that you should not not use Goliaths like that. They are not meant to be all around counter that just runs into a retreat point. Did you really expect the enemy not to counter a highly visible high threat?