Why was Wilbur was nothappy with his freedom?

Wilbur was not happy with his freedom because he felt lonely and isolated after being separated from the other animals. Despite the excitement of being free, he longed for companionship and the sense of belonging he had previously experienced. His freedom brought him anxiety and uncertainty, making him realize that relationships were more important to him than the absence of constraints. Ultimately, he craved the comfort and connection that friendship provided.