The degree of the crisis is unprecedented...
It is not merely a matter of degree, but of kind. A bogus Council held in and approved by Rome, altered Sacramental forms across the board, and a list of 'official' deviations that could go on and on. Something like this has never occurred. Anyone who cannot see this fact is as blind as a bat.
Trent standardized sacramental forms across the board. It altered them in the sense that it did away with any liturgical rite younger than 200 years old.
OBVIOUSLY Trent did a good thing standardizing the Roman Rite in the West and protecting against novelty.
VCII was a valid Council, not bogus. It simply dealt with pastoral realities and later the crew enacted disciplinary laws. It created the "Great Facade", but changed not one iota of Catholic dogma. It is a chameleon Council that can shape shift depending on who is implementing it. Couple that with a Pope and Episcopacy who don't enforce any of the laws on the books and you have complete chaos and loss of faith.
We agree on the effects. It seems you are saying the cause is a complete apostasy of almost the entire clergy, Pope, and a false Council. I think that argument conflates the scale of the destruction with the scale of the cause.
Vatican II is simply blithering hot air and the implentation was on the level of disciplinary laws. The post-conciliar Popes have not defined a single dogma nor have they exercised their infallibility. The Abbe de Nantes tried to put Paul VI on trial under the theory that, even though Paul VI would judge his own case, it would force him to disavow his "heresies" or else proclaim official and once and for all infallibly that his "heresies" were true and correct. The Vatican didn't even accept his docuмents and, I think, had police escort the Abbe away before he could even file his case.
The sede case concludes too much. It is not supported by the evidence no matter how much hand waving and dog and pony show appeals to the atrocities one makes.
Yes they are outrageous, unprecedented, scandalous actions and misleading and conducive to error opinions that cause mass confusion. But a thousand of these don't equal infallibly defined error or formal heresy.