Does Frank Miller End Up Killing The Protagonist In Most Of His Works?

Perhaps one of the first protagonist characters Frank Miller had killed was Electra. He had also created that character for the Marvel series. He intended for her to remain dead but she was revived because of her popularity by the Marvel franchise. In the movie called Elektra she was again killed off and resurrected or revived.

In the noir series of comics called Sin City on which the film was based most of the primary characters including Marv played by Mickey Rourke and Detective Hartigan played by Bruce Willis both end up dead in the end. While Marv lets the law take its course and execute him the other commits suicide. Both take these steps to protect their loved ones. The 300 was partly based on facts and centred on the Battle of Thermopylae and as such required for most of the Spartans including King Leonidas being killed.