What religious people mean by “god” means nothing to me beyond an incoherent cluster of concepts from which the aforesaid folk choose the subset most convenient to themselves.
But the word brings to mind the man-made phenomenon of religions, whose net effect on humanity now as throughout history has been, by a considerable margin, negative. It would be so just because of the falsity of belief; and the consequent absurdity of behaviour premised on the idea that there exist supernatural agencies who made this very imperfect world, and who have an interest in us that extends to our sex lives and what we should and should not eat on certain days, or wear, and so on. But it is worse than false: it is far too often oppressive and distorting as regards human nature, and divisive as regards human communities.