How do Charlie's work friends behave after he returns to his old job?

After Charlie returns to his old job, his work friends initially express excitement and support, welcoming him back with enthusiasm. However, as time goes on, some exhibit jealousy or resentment due to the changes in Charlie, particularly regarding his newfound confidence and skills. This dynamic creates a mix of camaraderie and tension, as they navigate the adjustments in their relationships with him. Overall, their behavior reflects a blend of genuine friendship and underlying insecurities.