One commentator noted that Protestants see final authority as resting in Scripture alone, and Catholics see it in the Church alone.
But one could say that in another way: for Protestants the final authority is their own private judgment of the Scriptures, and for Catholics the final authority is the consensus of the Church / Magesterium / Tradition.
When it is phrased that way, I clearly side with Catholicism.
As Tertullian teaches:
"They [Heretics] put forward the Scriptures, and by this insolence of theirs they at once influence some. In the encounter itself, however, they weary the strong, they catch the weak, and dismiss waverers with a doubt. Accordingly, we oppose to them this step above all others, of not admitting them to any discussion of the Scriptures.
If in these lie their resources, before they can use them, it ought to be clearly seen to whom belongs the possession of the Scriptures, that none may be admitted to the use thereof who has no title at all to the privilege.
Truth is just as much opposed by an adulteration of its [Scripture's] meaning as it is by a corruption of its text.
Our appeal, therefore, must not be made to the Scriptures; nor must controversy be admitted on points in which victory will either be impossible, or uncertain, or not certain enough. But even if a discussion from the Scriptures should not turn out in such a way as to place both sides on a par, (yet) the natural order of things would require that this point should be first proposed, which is now the only one which we must discuss: "With whom lies that very faith to which the Scriptures belong. From what and through whom, and when, and to whom, has been handed down that rule, by which men become Christians?" For wherever it shall be manifest that the true Christian rule and faith shall be, there will likewise be the true Scriptures and expositions thereof, and all the Christian traditions.
Since this is the case, in order that the truth may be adjudged to belong to us, ‘as many as walk according to the rule,’ which the church has handed down from the apostles, the apostles from Christ, and Christ from God, the reason of our position is clear, when it determines that heretics ought not to be allowed to challenge an appeal to the Scriptures, since we, without the scriptures, prove that they have nothing to do with the Scriptures. For as they are heretics, they cannot be true Christians, because it is not from Christ that they get that which they pursue of their own mere choice, and from the pursuit incur and admit the name of heretics. Thus not being Christians, they have acquired no right to the Christian Scriptures; and it may be very fairly said to them, ‘Who are you?’”" - Tertullian "The Prescription Against Heretics"
In football (soccer) games in England, the home team shouts at newcomers and the opposing sides: "who are you!?" (which sounds like: Eww AHHH YAAHH). That reminds me of Tertullian here.