Yeah that's unfortunate, though do keep in mind that you're hardly unlucky for not getting a Shiny in 150 attempts. Your chance of getting at least one Shiny in 150 attempts is about 3.6% (if I'm remembering binomial probability correctly lol). It's definitely better than the near-zero chance of hatching all those eggs with the same sex, but your chance of getting that Eevee so soon was still bad.