Recently, in several places on the web the issue of the day against Catholics appears to be the Canon of Scripture. I will try to answer some points.
1. The Catholic Church did not infallibly declare a Canon until Trent. True
Yes, that is true, but there was no reason to prior to Trent. The Church had other issues to attend to, and there was little dissension.
Evidence of this is that the Bible the RCC uses is almost identical to the Orthodox Churches which split from the RCC in the 11th century.
2. The Catholic Church is not "Bible Based". Yes and No.
The Church pre-dates the New Testament. As a matter of fact, Acts and the Epistles are the recorded history of the early Catholic Church. The Church is Christ based, the Scriptures came out of the Sacred Tradition, which still guides the church to this day.
Now, the Catholic Church is Bible based in that the Bible is used more extensively in the Catholic Mass than in many Protestant Churches. The Bible is read in its entirety in the Catholic Church over a 6 year period. How more "Bible based" can you get?