The Novus Ordo Mass is a Protestantized Mass. I consider it to generally be valid, but I certainly would not recommend attending it.
Using your standard, what "proper authority" declared the NOM to be a protestantized Mass? Those who consider Francis-Bergoglio to be an illegitimate or at least doubtful pope recognize the same protestant deficiencies in him, namely, he's not a Catholic, same as the NOM isn't Catholic. (FWIW, I consider it to be valid but illicit. I believe Our Lord is made present but only by an illegal act performed by criminals, just as He was present before Pontius Pilate but only by an illegal act performed by criminals. He's a prisoner Who's mocked in the NOM as much as He was as He stood before the Sanhedrin and suffered its mockery, but only by His will.
Fiat voluntas tua.) It's rank hypocrisy for R&Rs to criticize sedevacantists, sedeprivationists (of whom I'm one), and sededoubtists (Ladislaus) for using "private judgment" to recognize Francis-Bergoglio as a spade and label him as such, when R&Rs themselves use "private judgment" to recognize the NOM as a spade and label it as such (as we all should). In actuality, of course, none of this is "private judgment"; it's good, old-fashioned
sensus Catholicus. Bottom line: Either we're all "guilty" or none of us are.