I have always heard some remarkable achievements from the IGP since his appointment by the previous government. The thing is when you try to create a system that deals with corruption, you become an enemy, probably that may be one of the reasons why they want him out of office. Unless I'm wrong about him but I have always heard good things about him until now.
It is not entirely true from my lenses. He became the most popular IGP of all times not because he has achieved more that his predecessors but because he used the media to project his achievements.
Listening to lots of Police officers, he has has done more harm than good to the police service.