In their introduction to 2Peter in the New American Bible, they state:
The bishops list numerous reasons why 2Peter could not have been written by the Apostle Peter.Among modern scholars there is wide agreement that 2 Peter is a pseudonymous work, i.e., one written by a later author who attributed it to Peter…
In the first chapter, the author of 2Peter claims to speak with authority because he, the author, was there with Jesus at the “transfiguration” described in Matthew 17.
The epistle-writer says:
Clearly, the statements in boldface are outright lies.16 We did not follow cleverly devised myths when we made known to you the power and coming of our Lord Jesus Christ, but we had been eyewitnesses of his majesty.
17 For he received honor and glory from God the Father when that unique declaration came to him from the majestic glory, "This is my Son, my beloved, with whom I am well pleased."
18 We ourselves heard this voice come from heaven while we were with him on the holy mountain.
That the Catholic Church at some historical point included 2Peter in the official Bible (which is the Word of God) could be seen as some sort of honest mistake.
The Church’s continued inclusion of this bogus, lying document as the word of God hurts the Church’s claim of authenticity, let alone honesty.
2Peter addresses the” scoffers.”
The early Church’s belief that the second coming would happen in their lifetimes was a gigantic misunderstanding. The people, apostles and such, who were actually there, living and traveling and talking with Jesus, completely misunderstood his promise to return soon.
How much else of Jesus’ preaching was misunderstood?
Per the statue pictured above (click on image for source) St Peter had a great physique with a nice net. But he did not write 2Peter.