I don’t pray the Rosary. And the Scripture that Paul was referring to in his letter to Timothy was the Old Testament.
Also, Since Paul WAS a part of the Church, his instruction to Timothy was correct. He doesn’t say interpret scripture any way you want. He also doesnt say reject the teachings of the Church either.
"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; 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."
Peter considered Paul's writings to be Scripture. And yes, there are some things hard to be understood. Wonder why that is? He doesn't say that about James, or John, or Jude or anyone else. Just Paul's words of Scripture.
He doesn't say to reject the teachings of the Church? What Church? The Church the Body of Christ? He was writing the teachings of the Church the Body of Christ, from direct revelations of the risen Christ. It would be ridiculous to tell others to reject the teachings that Christ gave him to give to the Body of Christ.
You must be talking about the Church, as in the Catholic Church. Of course he said to reject the teachings of false doctrines that would deceive and destroy. He said if anyone preaches any other gospel than the one of grace that was delivered to the Galatians unto another gospel, one that would pervert the gospel of Christ, let him be accursed. A REAL anathema. From Christ to Paul to anyone who would pervert the gospel of the grace of God. Which would include adding works to the finished work of Christ for our salvation.