That said, the situation in the West has certainly not been positive.
I am certainly a critic of some of what has come about since Vatican II, but I'm not sure it's a "cause/effect" relationship. Pope St. Pius X wrote of the modernism that was threatening the Church from within nearly a hundred years ago.
I am more inclined to think that some of the nonsense we've seen in the years since Vatican II is really just a reflection of the sickness of modernism that predated it. At worst, Vatican II acted as a conduit, and was misused by people that would have used anything available to them to further their ends.
In other words, I'm not sure that even without Vatican II, we wouldn't be facing the same sorts of problems. I'm afraid that sometimes, by focusing too much energy on the perceived faults of Vatican II, we miss the real source of the problem.
Right on.
In Rome and throughout the world there is a whole hive of ceaseless activity on the part of termites toiling away feverishly in the shadows. This compels us to intuit the active presence of a complete plan of trickery bent on disintegrating those doctrines which form and nourish the Catholic faith. An ever-increasing number of 'straws in the wind' coming from various quarters bears witness to the gradual unfolding of a broad and progressive plan of manipulation, under the extremely capable leadership of seemingly devout men, calculated to uproot Christianity as it has been known and lived for 19 centuries, in order to replace it by a Christianity of the "new age." (Msgr. Antonino Romeo, Divinitas 4 (1960), p. 454)