1) WHAT doesn’t exist before 100 AD?
2) Why doesn’t abundant historic evidence constitute proof?
The sermons of the Apostles.
Any proof or evidence that any Apostle taught half of what Rome teaches and you assert.
2) Why doesn’t abundant historic evidence constitute proof?
Evidence of what? To be evidence that it was taught requires an unbroken line of proof that it existed at each stage, which you have demonstrated over the years you can not prove.