I agree that the "Dark Ages" is a slanderous misnomer.
My main point is that, whether or not we are currently at a high point or a low point, the promised kingdom is here and if I want more information then I should listen to the ministers of that kingdom.
My rule of thumb is that if there is a God worth following, then He is good and would have ordered things such that it would be as easy for an idiot to find Him and to live according to His will as it is for the very intelligent.
The only way this is possible, is if God constructs an obvious and visible institution where all can be taught right belief and action. It is the Proverbial City on a Hill. The "Reformation" has proven conclusively that even the very smart cannot come to truth on their own. Each has his own interpretation at odds with all others. This breaks my rule of thumb. If the intelligent cannot agree on the truth, what chance have the simple?
But by the Grace and promise of God we have His kingdom in the Universal (Catholic) Church as an everlasting beacon and bulwark of the truth. This is not to imply that it's Ministers are never corrupt or have wolves hiding among the shepherds, but the teachings and Sacraments are uncorrupt and a humble soul will ever be able to find God and His peace within His Kingdom.