You need to demonstrate that John held the keys of the Kingdom. Show us where he was given the keys or we'll just have to take your claim for what it is - a figment of your imagination.
If your point was authority, what was your point in making the false claim that "There was little divine about the Catholic Church in the dark ages"?
While pieces of the primitive church survived, the doctrine was thoroughly Hellenized.
You're going to have to back up this claim, too. Where do you get this stuff?
I do not argue with the good that any group does and certainly the Catholics have done immense good despite the failings of some of their priests
Show me a church without sinners.