The fine-tuning argument as evidence for a creator, especially one of the proposed "God" kind, always had a curious flaw in my view. A flaw that somehow all its supporters keep to ignore.
If the universe is "fine-tuned"... what is it fine-tuned to?
Every physical concept we observe or postulate, every "law", every "constant", is based on the very "universe" that we observe. From our view, the universe would appear to be fine-tuned... to itself.
But with the idea of an non-physical, omnipotent deity creating "ex nihilo" - from nothing... there just isn't anything to fine-tune to. The very idea implies that the creator had to follow some general universal rules in his creation... and that contradicts the whole concept.