Being Roman Catholic does not make one a Christian. Nor does not prohibit one from being a Christian. The RCC has a lot of extra-Biblical doctrines that non-RCC Christians find repugnant - because the Bible tells us so. But most RCs don’t seem to care about Truth, only RCC dogma.
IT is YOU say the Bible tells "YOU"
The fact remains that you cannot point to consistent early Christian writings to back up your wild claims.
All you can do is point to the reformers and their TRADITIONS on how they interpreted the Bible against Catholic teaching and than ADD your OWN interpretations to do the same.
What I'm saying here would require you to be honest with yourself.
I wish you a Blessed Day!
The Church decided what the canon will be. That included those books which the non-RCC "Christians" find "repugnant." It was them who changed the canon. Fine, it's their right, but that doesn't make them Christians either.