In a way you made my point by calling it the "Tridentine Mass" (as in Council of Trent). Obviously made codified in Pope Pius V's 1570 missal (called for in the Council of Trent, though admittedly had been practiced to some degree in parts of the RCC before that).
It's analogous to an argument I heard between two fellow Protestants about "original" worship music. Turns out she was wanting music that the Gaithers made common in church. Good music? Influential in your Christian walk? Yes and yes. But don't state a case for it by saying it's the original church music, which is incorrect. Same with similar arguments I heard among Methodists and music that Charles and John Wesley wrote (even older than the Gaither music). I'm encouraged by it too, but I hate making an argument for it by saying it's original or Biblical or 1st century church or anything like that, because that's not the case. Likewise, one would think that a better argument for the Latin mass would not be that it's "traditional" or "original" or "Tridentine", but if it's something that's in the Bible, or that Christ Himself would honor, or if there's evidence outside the Bible that the apostles pushed them, etc.
Don't get me wrong. Even though you are Catholic and I'm Protestant, I'm on your side. Should the RCC do like Protestant churches are having to do and clean house to get the hedonists out? Yes. Absolutely! But let's all make sure that we not only stick to the right things, but make our cases for sticking to them in a way that can't be undone by the relentless hedonists always looking for an edge or loophole to worm their teachings back into our good churches.
Historically the pre tridentine Mass of the West likely changed to Latin from Greek in the 200's and had some reordering in the 500's but was fairly consistent after that. Some of the smaller western rites had drifted which was one of the reasons Pius V issued Quo Primum in 1570 to regularize it. Throughout any changes were always gradual and made with good reason- unlike the 1969 "revolution" which brought us the Novus Ordo.
The biggest issue is that when you look at all the changes- they always diminished what made the Mass uniquely Catholic - the sacrificial nature of the mass, and the focus on the worship of God as opposed to focusing on humanity's inherent goodness. The changes were made with an obvious agenda in mind.