And Trent was unprecedented too.
That's because the Church never issued an apostolic constitution preventing changes to the missal before Quo Primum, and the Tridentine Mass remained 100% Catholic which means there was no substantial change or novelty to the Mass. The "mass" of Paul VI is a novelty and not Catholic, and it, thereby, violates Quo Primum and is unlawful. Even if QP was never decreed, the new "mass" would still be illicit and not Catholic. So you can play mental gymnastics with Quo Primum and rationalize that it doesn't prohibit substantial changes to the Mass, but that doesn't excuse the new order "mass" as being licit and Catholic.
A sudden series of reforms doesn't mean you get to rewrite Quo Primum to mean what you want it to mean.
That's what you're doing.
What Quo Primum forbids is any alteration whatsoever. The fact that a number of popes(including the pope who wrote it) altered it thereafter leaves you with only two possibilities: Either Quo Primum's provisions were not intended to be irreformable by popes, or all those other popes broke the law too. The answer is of course the former. Papal bulls can be overriden freely by proceeding papal bulls.
Your attempt to put words in a saint's mouth and lie that Quo Primum only referred to substantial changes has no basis whatsoever.
Wrong. See my previous comment again which you obviously can't comprehend or you stiff-neckedly reject due to pride.
As per Quo Primum
"[...] whereas, by this present Constitution, which will be valid henceforth, now, and forever, We order and enjoin that nothing must be added to Our recently published Missal, nothing omitted from it, nor anything whatsoever be changed within it under the penalty of Our displeasure.
"[...] Therefore, no one whosoever is permitted to alter this notice of Our permission, statute, ordinance, command, precept, grant, indult, declaration, will, decree, and prohibition. Would anyone, however, presume to commit such an act, he should know that he will incur the wrath of Almighty God and of the Blessed Apostles Peter and Paul."
https://www.papalencyclicals.net/Pius05/p5quopri.htmWe only need to look at the counter church, today and for the 51 years, to see this very wrath upon her.
Holy tradition carries as much weight as written precepts, while at the same time, holy tradition stems from written precepts (as well as by word). The Tridentine Mass was substantially unchanged for approximately 500 years due to Quo Primum because the Church knew the papal bull's meaning and intention. The Lord God gave humans inference reasoning and logic to employ so we don't have the tedious and potentially limitless task of covering every interaction word-for-word in order to make something lawful.