Goshhh Dooku is seriously the biggest missed opportunity of the prequels. He has like, a minute or two of screen time where he isn’t fighting and it’s so infuriating.
For about 20 minutes while watching Episode II for the first time I thought it was brilliant that he captures Obi-Wan and basically tells him the truth. It looked like they were setting up Dooku as one of the founders of the Rebellion. Having a “bad guy” be basically be on the same side as the Rebels would have been an interesting twist. But they flushed that down the toilet by the end of the film.