Negative utilitarianism claims that it is better to not exist at all, than to live a 1,000 years of pure bliss but also experience one mildly-annoying mosquito

Negative utilitarianism claims that it is better to not exist at all, than to live a 1,000 years of pure bliss but also experience one mildly-annoying mosquito bite. Seems very counterintuitive to me.