There are varied reasons as to why so many parishes and dioceses are failing. As Michael Brown explains in his excellent article, "...the more frequent problem is the suppressing of orthodox worshippers, as if they are misfits, when in fact they compose the majority of those attending daily Mass. If their devotions are antiquated and of so little use, one must ask why special graces are so often attached to them."
One of the devotions deemed "antiquated" by the elitist types who occupy positions of power in many parishes and dioceses is the Holy Rosary. I've often encountered resistance while trying to introduce a Rosary group at various parishes. And when I attempted to get a Marian Movement of Priests Cenacle listed in The Catholic Free Press [Diocese of Worcester], I encountered more of the same hostility [albeit covered with a very thin veneer of "politeness"].
Orthodox Catholics with a serious devotion to Our Lady will continue to meet with such hostility from "intellectual" types who believe in their own intellectual prowess more than they do the intercessory power of the Mother of God.
Related reading here.