The Roman Catholic Church has been in similar, and worse, situations before. To cite one instance, the period of the Reformation. Corruption, sins of moral turpitude, and all manner of un-Christian behaviour were ubiquitous.
But this was all the prelude to the "Counter-Reformation". It was initially a response to the reform movement but it soon took on a life of its own guided by the Holy Spirit.
The Council of Trent, which convened intermittently for 18 years (1545-63) conducted a root and branch reform of the Church. Many volumes have been written about the post-Tridentine Church but, suffice it to say, it DID reform and breath new life into the institutional church.
My point is that genuine, authentic and lasting reform must begin from WITHIN. Martin Luther (whatever one may think of him or his theology) was an obscure monk in holy orders (and many monks are not), a doctor of theology, and a professor at Wittenburg. His initial intention was not to start a "reformation" in 1517 but to REFORM the catholic church.
What will sooner or later happen (in my opinion) is that a movement will begin spontaneously and spread throughout the Roman Catholic Church and fully revitalize and rejuvenate it.
An old saying: the Church is an anvil that's worn out many hammers.
Bears repeating.
As a new convert, and seeing many of the 2000 new converts in our diocese this year, I say that the Church is making converts almost in spite of itself, and many of us aren't going to accept a corrupt, lavender episcopate.
Amen to your comments about the shifting tides of history.
We are the Church; we must help provide that "spontaneous" movement!