I know it's a surprise to many Christians to encounter folks who reject the Nicene Creed or simply ignore it as relevant to Christianity.
Mormons supposedly reject it as having meaning in Christian worship although it's probably more like they ignore it.
Jews ignore it too. Moslems have several standard sermons repeated several times a year in mosques throughout the world where the Imam (or teacher) argues with the Nicene Creed like there's no tomorrow.
You are right. The RC Church considers the Eastern Orthodox explanation of the Nicene Creed heretical. I wonder which version one must accept in order to be a “Christian”.