That would be helpful. You and I have discussed the history of the Catholic church in mediaeval England, and that the earliest definitive example of my surname appears in the Templar Inquisition of 1185. I was raised in a casually Protestant home, and became interested in genealogy in adulthood; this earliest discovery of my surname caused me to sour somewhat on Catholicism, something that I'd no cause to really think about prior, since there were few Catholics where I grew up, and we weren't exactly devout. It took me several years to come back around and accept that humans are inherently fallen but for the Grace of God, and that their institutions can be as well. It helped lead me back to Him in a way, odd as that sounds.
In fact, the ability of Christianity to retain its essential nature, of the centuries, is quite remarkable, given the weakness of many of our leaders.
I would call that a “miracle” in itself, and therefore argue that the weaknesses of the Church actually support the Divine origin of the Church, as we are obviously too weak to “keep the faith” without the Grace of God!