So what's a 'god'? Estro Felino seems to be defining the word to refer to whatever an individual/community takes to be
ultimate -- in the metaphysical sense of most real, in the moral sense of most valuable, and in a more psychological sense as most fulfilling in the
eudaimonia sense of the highest human good.
I think that there's both value and historical precedent for thinking that way.
If people think that Estro Felino is misusing the word God, then perhaps those people should be proposing their own alternative definitions and arguing for why their definition should be accepted, not only by atheists but by theists as well.
I think that most/all religions would say that their paths aren't just matters of assent to the proposition 'God exists'. Religions are about self-transformation. Theists see this as self-transformation in response to God's revelation or God's presence in all of reality, or whatever it happens to be.
That's why God has traditionally been decribed in terms of perfections: Perfect goodness, perfect ability, perfect knowledge etc. Because people should be striving towards perfection. They might always be "sinners" because they will inevitably fall short, but perfection is the goal, the ideal, even if it's unattainably distant here in this Earthly condition.
So it's quite reasonable for Estro Felino to observe that many ostensible "theists" are nowhere close to being in the proper relationship to God/ultimate value, and shouldn't think that they are merely because they agree with the truth of the proposition 'God exists'. All of the great religious traditions will agree that there's a lot more to it than that.
And equally, many people who insist that the proposition 'God exists' is false (our atheists, at least before
they started redefining words) might be closer to perfection, closer to the ultimate, than many of the so-called theists. Even if our atheists disagree with the theistic proposition, they will still have their personal paths with values, metaphysical beliefs and ideals of human flourishing, and perhaps something about how to move towards attaining them.