And YES. TRC, the Church was assaulted and infiltrated by various malefactors. That doesn't mean all, or even most, of the enemies were foreign.
And simply being "Traditional Catholicism" DID NOT prevent the enemies foreign and domestic from doing their damage. As stated, EVERYONE at Vatican II was a product of "Traditional Catholicism". EVERYONE who initially implemented the "Spirit of Vaticn II" was a product of "Traditional Catholicism".
The "Oath Against Modernism" didn't stop them The 1960 (and earlier) prohibitions against sodomites in seminaries didn't stop them. Rerum Novarum didn't stop them.
Thus my point: Simply returning to "Traditional Catholicism" will NOT solve our problems. Our problems (and those who caused them) did just fine swimming along in the sea of "Traditional Catholicism".
The Church must make a specific, focused, concentrated, public effort to identify and eliminate the various malefactors from positions of authority. The Church must make a specific, focused, concentrated, public effort to identify postulants and seminarians who are malefactors, and reject them. The Church must do these things EFFECTIVELY, not just as a show or a set of meaningless unenforced documents.
These efforts were clearly NOT part of "Traditional Catholicism". They should have been. They must be part of Catholicism in the future.
I'll repeat, VCII does not get a pass on the Church's problems today.