No need to shout. Catholics only need to show an infallible source other than scripture for what the apostles taught.
1) Do you advocate the doctrine of "Sola Scriptura" because you want an infallible source of truth, and it's the most likely or practical candidate, or because the doctrine of "Sola Scriptura" is true?
Those are two separate things.
Hopefully you believe the latter. But the doctrine can't be true, because it isn't biblical. It's a self-refuting doctrine.
2) The Bible is the Word of God.
It is reasonable to believe this, but the argument does not presuppose the inerrancy and inspired nature of Scripture. That would be a circular argument. The argument below is not circular.
While the Bible is divinely inspired and the written Word of God, it is NOT the ONLY source of TEACHING authority for Christians.
Paul calls the church, "the pillar and foundation of truth."
Paul also taught:
"I commend you because you remember me in everything and maintain the traditions even as I have delivered them to you" (1 Cor. 11:2This is in accord with Jesus' command."So then, brethren, stand firm and hold to the traditions which you were taught by us, either by word of mouth or by letter" (2 Thess. 2:15)
"Now we command you, brethren, in the name of our Lord Jesus Christ, that you keep away from any brother who is living in idleness and not in accord with the tradition that you received from us" (2 Thess. 3:6)
Paul told Timothy, "[W]hat you have heard from me before many witnesses entrust to faithful men who will be able to teach others also" (2 Tim. 2:2).
Jesus taught:
"Go and make disciples of all the nations... teaching them to observe all that I have commanded you."The early Christians said:"If he will not listen to the church, treat him as a pagan or tax collector."
Irenaeus"But since it would be too long to enumerate in such a volume as this the succession of all the churches, we shall confound all those who, in whatever manner, whether through self-satisfaction or vainglory, or through blindness and wicked opinion, assemble other than where it is proper, by pointing out here the successions of the bishops of the greatest and most ancient church known to all, founded and organized at Rome by the two most glorious apostles, Peter and Paul, that church which has the tradition and the faith which comes down to us after having been announced to men by the apostles. With that church, because of its superior origin, all the churches must agree, that is, all the faithful in the whole world, and it is in her that the faithful everywhere have maintained the apostolic tradition" (Against Heresies 3:3:2 [A.D. 189]).