You can't both deny its validity and rely on its truth. Its Acts, and its mostly about Paul.
Acts was probably written by the unknown author of Luke. That kind of makes it a second rate history book, whose main contributor would be Paul. Since Paul never met Yeshua, the contribution quoted would have been from some other unknown witness. According to you, apparently Acts is the Word of God, which makes you stuck with it. Me, I can take it or leave it if. If it does not aligns with the Law and the Prophets (Isaiah 8:20), I can dump it (Isaiah 8:20) . To establish any matter, it would require a 2nd witness. (Dt 19:15) & (Mt 18:16). You, on the other hand, rely on the authority of the "daughter of Babylon", and the testimony of the "false prophet". I gave a second witness statement, but apart from applying to Peter, it does not have a bonafide second witness.