@Genesis315 provided his quote from Lumen Gentium on how the document was to be received. It lays out two ways of responding to the Council: 1) as binding; and 2) by accepting and embracing. There is no option 3) by correcting its errors. Nor 3) dismissing it as outdated or insufficient.
The proper response to our question is “Catholics are not bound to accept Vatican II; they freely accept and embrace the Church’s teaching.”
You’re forgetting the clause “according the mind of the Sacred Council” which is what the rest of my post you omitted demonstrates. The Council itself stated much of its acts to not have permanent value being based instead on changing circumstances (certainly, its enunciation of the revelation of God, and those doctrines necessary for defending and expounding upon it, always have permanent value). The whole point of the Council was to address the Church’s approach to the “modern world” (by definition a finite time).
And what are those circumstances? Are they still the same today? Pope St. John XXIII in his opening speech explained the circumstances to which the Council intended to apply its pastoral guidance:
For example, he says “the fundamental doctrine of the Church which has repeatedly been taught by the Fathers and by ancient and modern theologians…is presumed to be well known and familiar to all.” This presumption is no longer valid.
Likewise, with regard to the errors in the world, he says
But all such error is so manifestly contrary to rightness and goodness, and produces such fatal results, that our contemporaries show every inclination to condemn it of their own accord—especially that way of life which repudiates God and His law, and which places excessive confidence in technical progress and an exclusively material prosperity. It is more and more widely understood that personal dignity and true self-realization are of vital importance and worth every effort to achieve. More important still, experience has at long last taught men that physical violence, armed might, and political domination are no help at all in providing a happy solution to the serious problems which affect them.
Again, this is clearly no longer the case at all.
Those are just a couple examples.
If Vatican II’s pastoral program was aimed at these circumstances, clearly that program is now out of date. The world today is much different than 1962 or 1965. The approach geared toward those past times should not be clung to with rigidity-- which Pope Francis defines as “intransigently faithful to a particular Catholic style from the past”–in the face of new circumstances. Sometimes new approaches are needed, and sometimes a return to older practices are needed (Vatican II itself did each for its own time, and each can be done again).