Then vote third party, even if you think they won't win. Because they won't win "this time," but if you never vote for them they'll never win.
You may be fearful that the party you think are bigger idiots than your party will win. But so what. Are you impressed by anything that either party has done? It really doesn't matter. It doesn't.
If you want more than two colors, vote third party. If you always settle, there will only ever be two colors.
I wish we had more minority party representation.