Monkun's return to duty

Monk lived throughout the series hoping to return to his job. But he was never reinstated. They always told him he wasn't ready, and yes, he wasn't ready. So how did he do his job before? They say it was like this after Trudy, yes, but ultimately he was always obsessive and difficult, and in the end, he solved Trudy's murder and found her daughter, which was good for him..