Non-voters: "I cannot vote for a candidate I don't support. If you offer me two sandwiches, one filled entirely with shit and the other with no more than 50% shit, I am going to choose neither"
Fair point. But this isn't a lunch buffet. It's an election. Unless you emigrate, you're going to be living with the outcome of that election. You are definitely eating one of those sandwiches. A decision will be reached, and opting out of voting doesn't rescue you from the consequences of everybody else's choice. So unless you genuinely don't care whether you and everybody else will be eating the 50% or 100% sandwich, you should probably get involved.