There are also plenty of Fans who want to read about Hal. Green Lantern was one of DC's best selling titles in the mid-late 2000s and Hal was at his most prominent at that time. Writers write about whatever characters they want and if a writer wants to focus on Hal on the main GL book, that is up to them. It is incredibly ironic that you are talking about entitlement when you are being entitled.
No, GL got only one movie because the movie we got was bad. It had nothing to do with the Lantern or Lanterns who was the focus of the Movie.