Unconditional Love for Parents despite Refusal
The child's love for his parents did not lessen despite being refused for everything because of several reasons:

Emotional Bond
The bond between a child and his parents is inherently strong and emotional. This bond is built on years of care, love, and emotional support, which creates a deep connection that is not easily broken.

Dependency
Children are inherently dependent on their parents for their physical, emotional, and psychological needs. This dependency creates a sense of loyalty and attachment that is difficult to sever, even in the face of disappointment or refusal.

Hope and Belief
Children often hold on to the hope and belief that their parents will eventually understand their wishes and fulfill their desires. This optimism keeps their love intact, despite repeated refusals.

Unconditional Love
Children have an innate capacity for unconditional love, especially towards their parents. This love is not based on receiving material possessions or fulfilling desires, but on a deep-seated affection and connection that transcends material needs.

Emotional Resilience
Children are often more emotionally resilient than adults, and can continue to love and seek approval from their parents even in the face of rejection. This resilience allows them to maintain their love, even when faced with disappointment.
In conclusion, the child's love for his parents did not lessen despite being refused for everything because of the strong emotional bond, dependency, hope, belief, unconditional love, and emotional resilience that characterize the parent-child relationship.