Contradiction with Matthew 13:58
It contradicts by showing that Jesus did not perform many miracles in Nazareth due to their unbelief.
Matthew 13:58: And he did not many mighty works there because of their unbelief.
Contradiction with John 12:37
Despite the numerous miracles performed by Jesus, many people still did not believe in him, contradicting the notion of widespread belief seen in Mark 6:55.
John 12:37: But though he had done so many miracles before them, yet they believed not on him:
Contradiction with Mark 7:36
This verse contradicts by indicating Jesus commanded them not to tell others about the miracles, contrasting the spreading word in Mark 6:55.
Mark 7:36: And were beyond measure astonished, saying, He hath done all things well: he maketh both the deaf to hear, and the dumb to speak.
Contradiction with Luke 5:15
Describes Jesus' efforts to spread his fame, but also his frequent withdrawal from the crowds, which contradicts the immediate drawing of multitudes in Mark 6:55.
Luke 5:15: But so much the more went there a fame abroad of him: and great multitudes came together to hear, and to be healed by him of their infirmities.
Contradiction with John 6:66
While Mark 6:55 shows people flocking to Jesus, this verse shows that many of his followers left him after a difficult teaching, contradicting the enthusiastic seeking in Mark.
John 6:66: From that [time] many of his disciples went back, and walked no more with him.