The modern question of 'whether God exists, or not' is a fake problem, a pseudo-problem.
We know that God exists.
(We all know this by revelation and experience; built-into us before we were born into this mortal life: We are born knowing it - and there never was any significant dispute about this obvious fact until very recently in human history.)
The proper question is what we do about it.
God exists - but there is a choice concerning what we, personally, are going to do about the fact.
We do not have to be grateful to God for what He has done for us, nor do we have to love God. We can choose to blame God for what He has done for us, or not done; we can choose to hate God.
In other words, we can choose what side to be on: God's side; or not-God's side.
We know that God exists, and we can only claim not to know God exists by also claiming ignorance of all the profoundest, deepest matters.
Modern Man has taken this route: modern Man has tried to escape the dichotomy of being either/or for/ against God by pretending not to know about God.
Having done so, modern Man finds that he is forced to deny knowledge of all Good.
Thus modern Man (who falsely claims 'not to know' whether or not God exists) is forced to be a 'relativist', indeed a nihilist; modern Man is forced to claim that truth, beauty and virtue are equally uncertain, as equally unreal, as he pretends God to be.
In denying the reality of God, modern Man denies even the possibility of meaning and purpose.
(Because if we cannot know the reality of God, we cannot - by exactly the same arguments - know the reality of Good. If God is merely an evidence-free subjective assertion, then so is Good.)
The fake assertion that he 'does not know' whether or not God is real is the condition that stuns, dismays, paralyses modern Man - which makes him hate himself, his life, his civilisation - which drives him into self-distraction and self-delusion.
Behind this pretence-piled-upon-pretence; we all know that God exists: that is not the problem.
The true questions relate not to existence but to matters such as the nature of God, his motivations, his relation to us, our responsibilities and destiny; and the implications of the answers for our own un-evadable choice: pro or contra.
Note: I use the singular God as a short-hand which implicitly includes 'gods'. This is an argument for deity, not for monotheism.