One of my graduate degrees is in biblical studies, so I really don’t consider myself naive on matters related to the New Testament. Before retiring, I was a professor who taught on rotation both Trinity and Christology and so I also do not find the conclusions you draw to be accurate – about either the thought of Paul or the thoughts of the Synoptic writers.
There are profound theological ramifications that rest upon the various decisions of the first seven ecumenical councils relative to the Trinitarian heresies and the Christological controversies. If you choose an Adoptionist position, for example, then one is left with many soteriological problems that are not resolvable. There is a reason that heresy presented itself early and was dismissed by the Church; it was theologically inadequate in the face of the very data from Sacred Scripture. Your posts seem to indicate that you have awareness of all, or at least most, of these issues.
I am not clear, thephilosopher6, if your approach relative to your posts is merely philosophical and/or historical or if it is really from a faith perspective. If your search is truly a sincere one, then I re-propose the writings of the Fathers of the Church and the deliberations of the Council Fathers since they grappled with many of the issues you say you are struggling with yourself, such as how to understand the Holy Spirit. If, on the other hand, your post is simply to be provocative, that would not be very nice.
In any event, hoping that yours is a sincere search for Truth, I wish you well in your faith journey and I pray that the Lord will guide you to Himself and to a deeper and ever fuller knowledge of Him and the mystery of His inner life.
Good night.