Even tho the Goddess of Frost finished her battle very quickly, same was not the case for her duo, another one of the elemental goddesses, the Goddess of Thunder, Thorenis.
She didn't used her elemental authority like Eludina to end the battle as soon as possible. Eludina had a very cold, calm and calculating personality, prioritising facts over emotions.
But Thorenis had a simple and honest personality and she always went with her emotions. That was also the reason why she didn't want to use her overpowered authority to beat the Slaughter Asura, instead wanted to use her ability as a warrior to win.
But she is also, like all other goddess, loyal toward the Supreme Goddesses. And as supreme goddess had ordered her to use her full strength to finish this battle because this is going to be the final one between the gods and the devils, she was very conflicted.