Contradiction with Matthew 28:18
Matthew 28:18 states that all power is given to Jesus in heaven and on earth, which seems unrestricted, whereas John 17:2 mentions power given specifically over all flesh.
Matthew 28:18: And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.
Contradiction with Hebrews 2:8
Hebrews 2:8 suggests that everything is subject to Jesus without exception, but John 17:2 limits the scope to "all flesh" and not universally all things.
Hebrews 2:8: Thou hast put all things in subjection under his feet. For in that he put all in subjection under him, he left nothing [that is] not put under him. But now we see not yet all things put under him.
Contradiction with Philippians 2:9-11
Philippians 2:9-11 emphasizes universal submission to Jesus' name, while John 17:2 focuses on authority over all flesh for granting eternal life.
Philippians 2:9-11: Wherefore God also hath highly exalted him, and given him a name which is above every name:
Contradiction with Colossians 1:16-17
Colossians 1:16-17 describes Jesus as having supremacy over all creation, whereas John 17:2 specifically mentions authority over all flesh.
Colossians 1:16-17: For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether [they be] thrones, or dominions, or principalities, or powers: all things were created by him, and for him:
Paradox #1
John 17:2 could raise questions about the balance between free will and divine authority. The verse implies that Jesus has authority over all people, which might seem to conflict with the idea of humans having free will to accept or reject faith. This tension between divine control and human choice can be seen as a theological inconsistency.