To apply the word "purpose" to evolutionary theory would be a category error. You are attacking a straw-man.
I do not hold the presupposition that life necessarily entails purpose. It is a process that continues while conditions are favourable to it.
Do you feel it is true that there is a "God" that allegedly walked and talked in a garden that has no evidence of having existed, poofed people and animals into existence, and later, in a manner contrary to the modern understanding of genetics, populated the planet with a tiny group of individuals and animals that survived a global flood in an unbuildable boat, a flood that killed the dinosaurs in a manner that only *appears* to be 65 million years ago, because the Earth is really only somehow 6000 years old, yet remains, by every objective measure to date indistinguishable from nothing?