Chapter one of Mary Shelley's Frankenstein defines Victor's early childhood and his parents' admiration of him. The following excerpt from chapter one defines Victor as the "apple" of his parents' eyes.
They seemed to draw inexhaustible stores of affection from a very mine of love to bestow them upon me... I was their plaything and their idol... bestowed on them by Heaven...to bring up to good, and whose future lot it was in their hands to direct to happiness or misery, according as they fulfilled their duties towards me...It may be imagined that while during every hour of my infant life I received a lesson of patience, of charity, and of self-control, I was so guided by a silken cord that all seemed but one train of enjoyment to me.
Victor Frankenstein was most certainly loved by his parents. They desired nothing more than Victor's happiness. His happiness was the only thing which mattered to them. Being an only child, their time was spent showering him with everything they possibly could.
As Victor grew, his passion for science grew as well. His father, being a man concerned with his child's fate and existence, fostered Victor's appreciation with science. He obtained him the books he desired and taught him about the idea of dissecting previous scientific thought. Charmed by this, Victor became more engrossed in science than before.
In regards to Victor being a spoiled child, acting in rebellion, one could easily state (and support) that Victor was spoiled. One idea that may take some time and support is the idea that Victor acted rebelliously. While he did follow his desire to reanimate life without concern for his own health and family, it does not necessarily mean that he acted in rebellion (towards his family). Instead, they supported him.
One could state, however, that Victor was rebellious against the world of science. This may not be a result of his spoiled childhood; instead, one could relate it to his rebellion against his teachers at the university, new and emerging scientific thought, and science itself.