your Idea is that God is an incomprehensible being
I have no issue with God at some level being incomprehensible to us. He would be a pretty feeble God if human intellect could fully comprehend Him. I am confident that He has provided us all we need to know about Him but there are probably limits on what the finite can understand about the infinite. I don't find that a problem at all, in fact, it makes me want to praise Him even more as I realize that His greatness and loving kindness is beyond my comprehension.
Concerning your criticism of creeds: The orthodox view of creedal statements is that they are summary statements which have value only when they align with Scripture (Christian Scripture not LDS "scripture"). Most Christians would hold that the Apostle's Creed and the Nicene Creed meet that standard. Other creedal and confessional statements have less wide-spread acceptance. However, there is often edifying material in them but personally, I tend to hold to these loosely.
He has CHOSEN to not point out what is so bad in ANY of them; just makes a broad statement with NO evidence to back it up; merely parroting what JS had said so long ago:
"...the Personage who addressed me said that all their creeds were an abomination in his sight..."
Even JS can't say it was GOD that spoke to him!