Greek mythology is more likely to be real than Christianity.
If one were to take a step back and take an objective look at the world, what they would see is far more in line with the worldview of Greek mythology than with any Abrahamic religion.
In Greek mythology there are multiple gods that serve multiple purposes and are often at odds with one another. Given the chaos of the world existing simultaneously with beauty, love, and other good things, this makes sense.
Abrahamic religions like Christianity believe in one God that is supposedly all loving and all powerful. Given a quick glance at the world this clearly does not make any sense (consider the existence of child cancer, natural disasters, animal suffering, etc.).
For that reason, I fully believe Greek mythology is more plausible than Christianity.