What accounts for Quenu's lack of decisiveness and spoiled behavior?

Florent and Quenu move from Le Vigan to Paris where they share one large room in the Rue Royer-Collard. Florent discontinues his law studies and begins giving private lessons. Florent makes an effort to educate his brother, but Quenu shows no interest in learning from books. Nevertheless, Florent does his best to make a happy comfortable home for his younger brother Quenu and Florent asks nothing of the boy in return for his devotion. Florent does not require Quenu to help around the house at all. Consequently, Quenu grows up to be spoiled and indecisive.