The Australian system works a lot better. There are still the main 2 but there are a huge number of minor parties that actually have a meaningful impact. The minor parties are usually dedicated to single issues. The biggest minor party being The Greens who are about the environment. No one votes for a minor party because they want them to run the government but you vote for them to send a message to the major 2 about what issues you care about and then use your lower preference vote to pick the major party you like more.