But Sola Scriptura is flawed, and was invented in the 16th Century. Also, how do you know when a "tradition" contradicts the Bible?
With 40,000+ Protestant denominations all claiming "Bible alone" and the Holy Spirit guiding their interpretations, someone has some explaining to do.
There are some denominations that reject the Trinity, or baptism--and they will argue this based on "Scripture alone." We've even recently had some people in this forum arguing that Jesus and the archangel Michael are one and the same--based on their interpretation of Scripture.
A five-point Calvinist will argue that God predestines certain people to go to Hell, regardless of free will--based on "Scripture alone," and a Methodist will argue the exact opposite, based on "Scripture alone."
Another thing to note is that "Scripture alone" is not even in Scripture. Did you know that the first Gospel was written 30 years after the Resurrection of Christ? So what did the Church do for 30 years before it had the Gospels?
Your criticism of Catholicism is based on a lack of information, as well as a faulty understanding of what we actually believe and teach.
Sola Scriptura is flawed??? Is not God's Word complete? Why do we need something else when the Bible is the only God-breathed, inspired book? The idea of Sola Scriptura did not begin with Martin Luther, John Calvin or any of these heretics, it came right from the Bible!
2 Timothy 3:15-16 KJV
And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus. [16] All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
Only the Bible is able to thoroughly equip us. The only reason you need Catechisms and other books is to make sense of unscriptural practices such as prayer to dead saints (necromancy), prayer beads, priests inability to marry, grace being attached to church sacraments, Mary worship, etc. None of this comes from the Bible. This is Jesus' response to people who try to worship Mary:
Luke 11:27-28 KJV
And it came to pass, as he spake these things, a certain woman of the company lifted up her voice, and said unto him, Blessed is the womb that bare thee, and the paps which thou hast sucked. [28] But he said, Yea rather, blessed are they that hear the word of God, and keep it.
I agree, there are many "denominations". I am not apart of any of them. It all boils down to people interpreting the Bible with their own carnal minds versus praying and fasting to learn the mind of God like we should be doing. The Bible warns us of this so your arguments are unfounded. What is unscriptural is Catholics sole dependence of "church" leadership to interpret the Bible for them and believing their church over sound scriptural doctrine. Ill leave with posting straight from the inspired Word of God.
1 Corinthians 2:14 KJV
But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them , because they are spiritually discerned. (The things of God are discerned by his Spirit. There's your answer to why so many people are so far gone. Many of them simply don't have the Holy Ghost)
2 Peter 3:15-16 KJV
And account that the longsuffering of our Lord is salvation; even as our beloved brother Paul also according to the wisdom given unto him hath written unto you; [16] As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction. (Unlearned and unstable people were twisting the Bible back then. This is not new)
Acts 17:11 KJV
These were more noble than those in Thessalonica, in that they received the word with all readiness of mind, and searched the scriptures daily, whether those things were so. (These people didn't just believe the apostle, they studied the Word, not other writings, and got understanding for themselves and the Bible calls them NOBLE)