The letter of apostle Jude warns against false teachings and ungodliness, urging believers to contend for their faith. Jude emphasizes that eternal judgment awaits those who reject God, likening them to the rebels of the past. His message serves as a reminder to uphold the true gospel of Jesus Christ amidst modern corruption.
The Earth is young, according to biblical accounts, particularly Genesis, despite the unscientific claims of an old Earth. However the New Testament scriptures are all one needs to understand the creation. They also warn against rejecting God's established order which He created.
The world was created with perfect laws, but it does not mean that God had not planned a future that would be "messy". It has to be messy because idealized automatons do not grow and flourish in a perfect environment. Only through the pain and suffering do people come to know their Creator.