:nope: It is not an invention.
Invention, developed, introduced applied to the Nicene Creed appear to be a negative but spoken with the mind of the Church who possesses the mind of Christ, the negative reveals the positive. For example the doctrine of infallibility is a negative doctrine.
What you may not see here, is that the apostolic faith is already existing, when the Nicene Creed is introduced, invented or develops. The negatives point to the already Catholic and Apostolic faith handed down already exists. The invention of introducing a Creed in order to defeat the heretics and heresies infecting the Eastern Catholic Apostolic faith.
When the one holy Catholic and Apostolic Church already possesses and practices the Apostles Creed, which predates the Nicene Creed to which the Latin Church has never left the Apostles Creed and remains with this Apostolic faith professed since the Apostles.
But the Apostles creed is not used to defeat heresy, we use it to baptize, excorcism of satan’s works, to include the Word of God, Water, Spirit and a profession of faith. This is the biblical born again Apostolic faith ;unchanged. On a side note, protestants removed the sacrament of water and Spirit (baptism) and invented a Sola fide, Sola scriptura man made doctrine that can never save anyone.
The Nicene Creed is developed or invented in order to establish what is already believed in Orthodoxy. The Nicene Creed separated the Orthodox faith from the Heterodox in the East. So the negative from an invention of the Nicene Creed proves a positive that the Catholic faith already possessed the full deposit of faith. Because the Nicene Creed enters Church history later, does not mean that the Apostolic faith was not present. The Nicene Creed defeated heretics and heresies infecting the Eastern Apostolic faith already in practice.
In keeping with the OP here, the filioque, later in history addresses another heresy trying to infect the West, using the same Nicene Creed. The Pope does not invent another faith from filioque. The Pope declared the Apostolic faith that Jesus is God incarnate, because the Spirit eternally proceeds from the Father and the Son. When the heretics were teaching that Jesus is not God, from the Creed, because the Holy spirit does not proceed from the Son. The filioque professed within the Nicene Creed defeats any future heretics from denying the divinity of Jesus Christ, no matter how the denial or heretics critique the Apostolic professed faith.
Just as the earlier multiple councils defeated certain heresies in the East with the invention of the Nicene Creed. The Nicene Creed is developed in order to profess what is already believed to separate the existing wolves in the East from the flock of Jesus Christ.
Peace be with you