I think the lack of trust among Catholics caused by the infiltration, and greatly aggravated by petty rivalry, is one of the main reasons for the problems in Tradition.
As has been noted before, it is the clergy who have caused this. The layfolk have been manipulated and disturbed by clergymen with their own agendas.
The infiltration was made by unworthy Priests and Bishops who either had no vocation or fitness (or both) for Sacred Orders, and therefore God has abandoned them to their own designs and wiles: this is true no matter what stance you take (Novus Ordo, recognize-and-resist, sedevacantist, etc.).
St. Alphonsus wrote that men who enter Sacred Orders without a divine vocation and proper fitness were reprobates who are already abandoned by God. They shall never bear fruit, and whatever good they do shall not ameliorate their punishment at Doomsday, for it was God who made use of these vile instruments to make known His power and goodness: whatever good they may have done was never theirs but the work of grace despite their failures and scandals.
And this is about Priests who have valid Orders. Regarding charlattans, such as Ryan Scott, the Traditio "Fathers," the Duarte-Costa freaks, &c.: they most certainly have much to fear regarding their eternal destinies.