Yes, it is very human to have sympathy with Marcion as we all grapple with the paradox of a violent punishing God in some of the Scriptures and the concept that God is Love. James’ wonderful teaching on this shows us that it is our violence which is projected onto God. As you say we are all “trapped in these games and each one of us is invited to offer our violent mimetic selves to God for transformation.” Beautifully put, Maginel.
The “Cloud of Unknowing” and the “dark night of the soul” of John of the Cross, among many others in the contemplative tradition, describe the process that you speak of Maginel.