How to refute the Sagan Standard in the case of the existence of God?

Did you have a point?

Nope, all I require for disbelief is that a claim is unsupported by any objective evidence.

Straw man fallacy.

Begging the question fallacy, why do you assume that life has overarching meaning, beyond what we subjectively attach to it?

Why would a methodology like science, designed to remove as much subjective bias as possible, validate a subjective metaethical philosophy?

You seem to have repeated the same fallacious arguments, while avoiding addressing any of my questions, hmm…