I’d love to see what St. Pius X would have done to your impious ass if you had responded to his teaching with “he’s not the pope.”
Uhm, the difference there was that St. Pius X WAS the pope. Bergoglio is not. And, indeed, if I came to believe that Bergoglio were the pope, then I'd still rebuke you in the exact same terms. How dare you speak that way to the Vicar of Christ?
At best, pretending to cite Bellarmine and St. Paul, you're entitled to, "With all due respect, I must disagree with the Holy Father on this matter."
This illustrates in very practical terms how pernicious and how non-Catholic your brand of R&R is. It's not Catholic, but some kind of warped form of Old Catholicism, and you're in serious danger of losing your soul over it.