How did Charlie feel after the operation. Give two examples that show his feelings?

After the operation, Charlie felt a mix of confusion and disappointment. He struggled to comprehend the changes in his mental abilities, feeling lost as he grAppled with the loss of his newfound intelligence. For example, he expressed frustration when he could no longer understand complex concepts that had previously fascinated him. Additionally, the sense of isolation and loneliness grew as he realized that his relationships had been altered, leaving him feeling disconnected from those around him.