You shouldn't feel guilty about it, it wasn't your fault. Those golems have quite a bit of HP and hit reasonably hard, so the tank is to blame if he wasn't picking them up. Just don't be afraid to speak up if you think what you were told to do doesn't seem to be working. A dragoon's job is to do DPS, not to off-tank, and it really cuts into your ability to maximize your damage if you're unable to attack from the side or behind. The only time you might have to tank is on adds that do little damage and have low HP (like the gargoyles on the final boss in AK).