It would be less of an issue if the creature's ability activated with only non-creature spells, but as is, the card is incredibly OP because every instant, sorcery, creature, or enchantment activates its abilities. Killing/exiling the creature with a spell or forcing an opponent to exhaust their library seem to be the only real viable options to counter the card, and even those don't work most of the time.
It would be less of an issue if the creature's ability activated with only non-creature spells, but as is, the card is incredibly OP because every instant, sorcery, creature, or enchantment activates its abilities. Killing/exiling the creature with a spell or forcing an opponent to exhaust their library seem to be the only real viable options to counter the card, and even those don't work most of the time.