Just do publicly funded elections, including things like publicly funded frequent small debates where the candidates had to appear as reasonably competent adults who could defend their ideas, and resurrect some of the regulations like the fairness doctrine and caps on media consolidation
The dogshit quality of the current election coverage is mostly a problem because it is the only type of coverage that is available. I think if there was a widely available and well funded type of election coverage that wasn’t this cash grab horse race ad supported bullshit, the bullshit would have to compete against it and would lose and improve as a result.