I would hazard the guess, along with the information provided by Deacon Ed, that there are many liturgical abuses in the Tridentine liturgy that you have not heard about, and could quite possibly be worse than anything that has been attempted in the Novus Ordo.
You would be correct on that one. Since the earliest days of the Church, catechetical writings have given permanence to the doctrines that were being taught orally. Problems arose of course. People would choose what they wanted to hear as opposed to what the church taught.
The Protestant Reformation brought into sharp focus how poorly people had been educated in the faith. Several popes had tried to reform the Church from its erring ways, but to no avail. The mind set of so many years of poor catechesis had taken root. From Trent came the Roman Catechism of 1566. It was written to teach the clergy how to accurately explain the faith to the laity.
During the founding days of the United States, priests adapted European sources (local to European culture catechisms) for the US. In the late 1700s, A Short Abridgement of Christian Doctrine, Newly Revised for the Use of the Catholic Church in the United States of America was printed. Its various editions contained only the most basic essentials of the faith. In 1821, the first Bishop of Charleston published a larger American catechism. Others followed across the country but with poor results.
In 1829, the bishops came together for the First Provincial Council of Baltimore. There they decreed: “A catechism shall be written which is better adapted to the circumstances of this Province…”
In 1885, a committee of six bishops produced A Catechism of Christian Doctrine, Prepared and Enjoined by Order of the Third Council of Baltimore, known as The Baltimore Catechism. It was a question-and-answer summary of the Roman Catechism for the American culture. As good as it was and is, people continued to hang onto their own little foibles and not practice what the Catechism taught. And all of this when the Mass was still in Latin so it was not a fix and became a big part of the problem.
Pope Leo XIII and many others have tried to address the problem over the last century and more. Latin Mass or New Order of the Mass, the abuses continue to this day. They may be varied and different but they are the same mindset with a different twist is all.
Vatican Council II, produced a complete, universal catechism in order to provide uniformity throughout the whole, global Church. Of course Vatican II is maligned on every side just as Trent was in it’s day. Some things never change.