Using Scripture to accuse authority Christ himself ordained is not a "validation" of Scripture.
Undermining the validity of Scripture is certainly not a "validation" of Scripture.
Perhaps a study guide to the letters of John to the Seven Churches Which are in Asia might help.
I believe that it likely will not with you, but it might provoke others to take a new look at the Book of Revelation and consider that the Seven Churches of Asia were symbolic of the 2000 year historical record.
The Church of First Fruits being perhaps an allegory of the Apostolic Age, Smyrna the persecuted Church, Laodicea, Philadelphia.... and all between have their relevance.
Point being that Scripture has criticisms of the Church, including especially the New Testament Epistles to the local Churches which certainly do as well, as they were in many cases designed as instruments of correction.
The Founders of the Universal Church clearly thought enough of the Epistles to include them into the New Testament, but modern day apologists for the reckless usurping of Bible tenets included in that very same New Testament are determined to undermine its Spiritual value when it comes into conflict (which is not so infrequent) with personal beliefs and agendas.
Many posts out here are clearly designed to invalidate Scripture that was plainly supported by the early Church.