I Corinthians 13:11 must really get under your skin.
Not at all, simply indicates that you aren’t concerned about keeping scripture in context.
Try this:
2Pe 1:3 According as his divine power hath given unto us all things that [pertain] unto life and godliness, through the knowledge of him that hath called us to glory and virtue:
Eph 1:9 Having made known unto us the mystery of his will, according to his good pleasure which he hath purposed in himself:
God has made it known how to understand Him and how to worship him.
It is there for us to understand. God being Creator and Father of Jesus Christ is simiple.
Turning one into three and three into one then proclaiming it a divine mystery when the scriptures don’t go your way isn’t consistent with the Bible or the common sense God gave to children.
Are you capable of doubting the trininty?