Really? It’s obvious—that your position is self-contradictory and unbiblical. If believers are to believe and follow Paul’s teachings alone, as you claim, then we must believe that:
2Ti 3:16 All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness,
2Ti 3:17 that the man of God may be complete, equipped for every good work.
It can’t both be true that believers are to only believe and follow Paul’s teachings while he says all Scripture is to be believed and followed. “All Scripture” means all, including the OT, the Gospels, all the epistles, etc.
There is something wrong with your understanding of apostleship, which leads to a wrong understanding of which Scriptures are to be believed and followed by believers.