I agree, the one-and-only Living God is NOT really three "Persons".
God really is three "Manifestations" ... because all spirit beings, entities, etc. are sexless!
However, God knows that we would never have a personal relationship with an "It".
So, God decided to portray "Itself" as three "Persons" ... just for us ... just so we could relate to Him ... er, Them.
Happy now?