You base those statements on what, your interpretation of Scripture? Spend some time reading Acts and Hebrews and John and do tell, since you claim to know, what it is that Christ did and said that John mentions is not written in Scripture.
This is a bizarre question: Read the Scriptures and tell what John said wasn't written?????
I can't tell you all of the things that Jesus said and did that weren't recorded. But I can assure you that the things that were not recorded were not inconsistent or contradictory to the things that were written. Catholicism is totally inconsistent with what is written in the Scriptures.
My beliefs are based on the things that were recorded in the Scriptures (things that John said were sufficient), not on things imagined by men and claimed to be the things unwritten.