One reason the trinity (from R.C. upbringing) never rang true as it was taught--the feminine was excluded.
The second reason is that God from the O.T. (Torah) and N.T. are very different and I do not accept the the rationalizations in attempt to resolve the difference.
The trinity is a construct to talk about the esoteric. I would like a better model--something based on the tetrahedron.
I see the fingerprint of the omnipresent-omniscence-omnipotent in unified physics.