If you followed your "proper formal motive of faith" you wouldn't be here but on Catholic Answers defending the Conciliar Church. If not, tell us why not? On what basis do you reject the magisterium of the Conciliar Church?
Just FYI, your "inline" responses make it very difficult to respond to you. I had to copy-paste your response in after having found another place where you actually wrote some text in the body of your response.
I've already explained this a few times. I find that the Conciliar Church lacks the marks of the Catholic Church, and therefore its purported magisterium is not the Catholic Magisterium.
As per the teaching of Vatican I, the one place where there's room for reason and private judgment is in actually discerning the notes or authority of the Church in the first place. Once that is known, the assent of faith is given to the Church's teaching. Once one recognizes, based on the natural motives of credibility, that the Catholic Church has the authority of Christ, then one submits to that teaching authority, which authority becomes the formal motive of faith, as per the famous maxim of St. Augustine that he would not believe in the Scriptures themselves had the Church not proposed them to him.
Whether or not one understands theologically what exactly is going on, that is in fact the genesis and the raison d'etre of the entire Traditional movement. This thing over here which calls itself the Conciliar Church, this is not the Catholic Church. It is unrecognizable. Thus even the simple faithful can make that discernment. No theology degrees are needed.