Exactly! But this seems like a feature of a Two Party system rather than a bug?
What happened to the Free Market and competition?
The natural "free market" tendency to form monopolies as dominate parties buy out smaller ones.
Trump voters of course didn't prevent him becoming president. They wanted him, so they voted for him. That doesn't count in my book. So with 55% turnout, that leaves 45% who didn't vote. Still a large portion.