Contradiction with Jude 1:9
Jude 1:9 shows that even Michael the archangel did not bring a slanderous accusation against the devil, instead saying, "The Lord rebuke thee," contrasting with 2 Peter 2:11 where angels do not bring slanderous accusations before God.
Jude 1:9: Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.