You are holding what he did 20+ years ago (when he was idealistic and politically immature) against him? That a person cannot mature and change? Are the ideas and proposals he rolled out in the past 3 GEs 'mad'? Did he sound like a mad dog in his election rally speeches? Be honest.
That aside, how many opposition figures have worked as hard as he has without yet winning a seat in Parliament?
If you can see a calm, sober, level-headed politician give sound and logical alternatives to the PAP as a 'mad dog', then maybe you need to have your mind examined, not Chee.