One of the primary arguments Catholics use is to claim the Catholic Church canonised the Bible, which, for some reason, they think gives them the sole authority to interpret it. Now, there are several huge flaws with the claim that the Catholic Church canonised the Bible. There are also several huge flaws with the idea that this would somehow give them the sole authority to interpret the Bible, as opposed to everyone reading it just like any other document. But there is one question Catholics who make this argument need to answer: What was the Church using before the Bible was formally canonised?
The answer is the exact same books we have now. Before the individual books were compiled into one helpful volume, they still existed, and they were always authoritative. It's not like God inspired a book, then left it up to the Church to decide whether or not to believe it. No, the moment God inspired a book, it carried with it the authority of the God who inspired it. Therefore, long before the traditional canon was specifically listed (which historical evidence shows happened even before any council discussing the matter), it was above any Church.
Evidence within the Bible shows that these books were recognised even while the Apostles were still breathing. In 1 Timothy 5:18, Paul quotes Luke's Gospel as scripture. In 2 Peter 3:16, Peter calls Paul's epistles scripture. Scripture was known long before any council came together to recognise it.
There is further evidence that canonical lists existed early on. The Muratorian fragment, for example, contains a partial list of New Testament books that is very similar to the traditional list. It was written around 170 A.D. I found it amusing during one debate with a Catholic when he said no one knew what scripture was before the Council of Carthage because no one had produced a list. I mentioned the Muratorian fragment, and he immediately began claiming the Catholic Church produced all authoritative canonical lists, including the Muratorian fragment. He'd literally only just found out it existed, yet within 3 minutes, he tried to claim it for his Church, like a toddler entering a room and laying claim to everything within it. "This is mine, that is mine, everything is mine".
As you can see, even if it was true that the Catholic Church produced the oldest extant list of canonical books (key word: Extant. Many first and second century documents far greater than a list of books have crumbled to dust by now), such a list was almost redundant. The Church wasn't without the scriptures, it merely possessed them as separate books and scrolls. Now, where is the logic in saying "we added a spine to this collection of pages, therefore we determine what they say"? Answer: There is no logic in it! God inspired the prophets and Apostles, the prophets and Apostles wrote the scriptures, the scriptures were accepted by the Church, Satan sent out a few false scriptures, a council was convened to denounce those and clarify which ones are genuine, nothing about any of that gives the Catholic Church the right to take the scriptures out of your hands. The way Catholics argue, I'm beginning to believe if Satan himself had accurately assessed which books were canonical in 96 A.D., Catholics would bow down and declare him God, and if God Himself stood in the Vatican and told the Pope to step down, Catholic apologists would tell Him "no, we produced your Holy scriptures, therefore we tell you what it says".
As it stands, the absolute best way to discover what the scriptures say isn't to surrender your brain to a blatantly false Church, but to study them faithfully. If the Bible says "thou shalt not", no Church has the right to say "oh yes you shall". If the Bible says "thou shalt", no Church has the right to say "no you shan't." The problem for the Catholic Church is that it does both of these, even declaring anyone who doesn't agree with them is an anathematised heretic. This is the very reason they put so much effort into claiming sole authority over the scriptures. It's easier to claim authority over them than deal with what's inside them.