In star wars why did vader get 3 movies episode 4 -6 when DARTH MAUL only got 1!? Take out Dooku or keep him?

First of all your telling me that darth maul takes out both jedis in episode 1 knocking obi wan off the edge of that shaft. Then obi wan miraculously jumps out and gets him in 1 hit and kills him? Let me fix that: Maul shoulda sent him a force wind and Obi wan falls down the shaft only to be caught just in time by anakin in his spaceship. No need for applause I know I did a good job. Dooky shouldnt have been born and replaced by maul in episode 2 with pretty much the same setup and results except much better action obiviously with maul doing the fighting. And PLEASE im still mad at maces lack of respect in 3 with the cheap shot. May be him and dooku coulda had their own battle on the side in episode 2?