Sola scriptura as the Protestant tradition holds to it is inseparable from the doctrine of private interpretation of the Scriptures. All the reformers desired the unity of the Church but undercut, unwittingly, the very basis of unity which is the Holy Tradition. Being unwilling to submit to the authority of popes and councils, they did follow the Chalcedean tradition. But their successors have not and the result has been an erosion of faith in the truth of Scripture.
>>Being unwilling to submit to the authority of popes and councils, they did follow the Chalcedean tradition.<<
If the Popes and councils are authority and Iraneous was correct about only looking to the Scriptures for authority please find for me in Scripture the authority for believing in the ascension of Mary.
The problem in virtually every organized religion today is that they have strayed from, added to, or taken away from what is written in Scripture just as the Gnostics did.