Why is the brand of our only two viable parties in the toilet? Because they don't represent most of us.
The 2016 Presidential election clearly showed that the two parties do not truly represent us. Democratic voters were divisively split between the Bernie camp and the Hillary camp. Republican voters were so fractured that it is hard to identify all the factions, but we have establishment Republicans, Trump supporters, libertarians, evangelicals, and whatever it is that Ted Cruz represents (people that no one likes?).