if you don't vote for one of the two major piles of crap, then you cannot complain about the piles of crap that is shoved down your throat for the next 4 years....mmmkay
If I don’t accept something to begin with (in this case, the institution of coercive government), what logic would it be on my part to have any sort of association and/or dealings with it that perpetuates its legitimacy—and then complain about it? If I don’t like Chinese food, I don’t go to Chinese restaurants. (And since the owners of the Chinese restaurants can’t come after me to force me to patronize their businesses, then there’s no need for me to complain about Chinese food.)
But if you do associate and/or have dealings with something, then there is a tacit understanding that you have accepted its conditions. For example: If you are a left-winger who believes in government and voting—but obviously didn’t vote for Trump—then when Trump was elected you had no right to complain; you’d already agreed to the condition that you would accept the results of the election regardless of who wins. (Of course, a person can complain about certain aspects of the government in the same way that I can complain about some of the food in a restaurant that I do patronize.)
On the other hand, since I (as a voluntaryist) don’t accept the legitimacy of (nor even the need for) coercive government to begin with, I have every right to complain about this inefficient, corrupt monopoly forcing itself on my personal being when I don’t even want the services that it provides.