First I think you make an assumption that you can in no way back up that “Sola Scriptura was never practiced in the Church established by our Lord - EVER” It is your assumption that you can identify the church that Christ establised" which can only be assumed through the eyes of your particular church. Secondly most of Tradition is based on assumption, hear say, and word of mouth. Because of errors in word of mouth transmission writing was invented as a means to avoid such errors.
So you’re saying God lied when He promised the Church He founded would never be overcome by Hell’s Gates? Or did he lie when Saying the Apostles (church hierarchy, above the disciples) would be guided into All Truth by the Holy Spirit? Or did He lie when He said He would be with us always even unto the end of the world? Or did God lie when He said through the words of St Paul that the Church of the Living God is the Pillar & Ground of the Truth?
The simple literal meaning of the text can never contradict the possible deeper meanings it indicates. & the simple meaning of the text is that He gave Simon 2 keys to bind & loose & He specifically renamed him to Petrus - the Rock - & said He was to build His Church upon that Rock. Yes the Rock can also mean the Orthodox Faith in Jesus as the Son of the Living God - but not at the expense of the literal meaning that Peter is the Rock. The whole Bible shows the Catholic position to be the only true. For the scripturally literate it’s obvious that Christ alludes to how God appointed a Prime Minister to serve under the King during the Davidic Kingdom & the apostles would be known this.
Why is it the Roman bishop see & not the antiochian which was also founded by St Peter?
Because of the Consensus of the Fathers saw the petrine authoriy in Rome alone & that had to do with the fact that he was martyred there & that the shrine of Peter to which christians made pilgrimages was there & everybody knew it.
During the Caledonian council, the bishop of Constantinople tried to assume the same power to His See but that specific canon was rejected by the Pope. When the pope Leo sent a book to be read by his nuncio at the council that definitively rejected the heresies of monophysitism (oriental churches) & nestorianism (Syriac, & today’s Calvinist heresy) the other bishops said ‘Peter has spoken’.
The Greek orthodox has always recognized the primacy of the bishop of Rome but they object to the extent of the primacy - they say he is a bishop like all others but that he is like the ‘chairman’ of the world’s bishops conference.
Historically, the primacy of Rome was based on Christ’s giving of the 2 keys & that was accepted & believed in by the Greeks during the so-called ‘byzantine papacy’ when popes were Greeks & Italy was a Romanian byzantine province. Until the pope crowned Charlemagne Roman Emperor because Irene had usurped the eastern throne & killed her own son - both against all Christian law.
After this event the Greeks deny the ‘Rock’ being Peter & began speaking as they so today (but couldn’t have another ecumenical council as it would require popal approval) - the Russians simply extend this logic; if the primacy is only impartially based - Russia’s patriarch should be the 1st among equals. Not Constantinople, who didn’t have a bishop in the apostolic era & who has less believers & no empire. But Greeks still maintain belief in Roman primacy based on Matt 16 because without it - Constantinople loses it’s primacy which is ‘instead of’ the actual Primate in Rome, which is in schism.
As the Latin Church researched & theologized deeper & deeper into the deposit of faith it found just those parallels with the Davidic Kingdom in Isaiah & the Chief Rabbinate of Jerusalem that were so similar they couldn’t be coincidence but were specifically echoed by Christ & the Pope got a larger & larger role. The college of cardinals & the Vatican is like that chief rabbinate of the Temple. It’s a doctrine that developed just like the Holy Trinity developed without contradicting but by unpacking what’s implicitly there.
What’s clear is that all protestant sects are heretical & this has been agreed on by all apostolic churches. If you want to change a doctrine - you call an ecumenical council & have the bishops unanimously proclaim that doctrine & the pope approve it in a decree - you can’t just separate & form your own sect without cutting yourself off from the Church founded by God - I myself has painfully realized this is what my ancestral King did to our nation.
The Lutheran scholar Melanchton understood the illegitimacy of protestantism & pleaded with the patriarch of Constantinople to accept them in their communion - but the patriarch simply couldn’t neglect his duty to call the Lutherans to repent of their heresy & accept the teaching consensus of the fathers. Melancholy sent several letters, the patriarch reiterated the orthodox position on Sola Fide & Sola Scriptura & eventually didn’t even answer the letters.
Heresy is to choose to believe what’s wrong obstinately. If Protestantism is true all Christians before the reform were heretics because no one held protestant doctrines & that would mean Christianity itself is false because of Christ’s Promise that the Church would never Fall. Individual members practicing simony & selling indulgences wrongfully is 1 thing - but the doctrine & law remains pure