A movement of independents is gathering steam. Their appeal is to disgruntled voters who are fed up with the policies of their party they don’t like. Perhaps they have always been independents, often on the mantra of vote for the person, not the party. So they scatter their votes. My personal bias toward these people is that they lean conservative and libertarian; they just don’t see why we can’t treat each person as having the same resources they have: economic, educational, mental, cultural, linguistic, etc.
Let me offer another reason to sustain a party: The GOP. There really aren’t that many Republicans in the country, nor Democrats. Maybe if more people had voted in Republican primaries, a stronger Congress would have been able to stand up to Trump. Even deeper, a stronger Republican Party might have put up a decent candidate like Jeb Bush or John Kasich.