Perhaps you should read Lysander Spooner or even Rothbard. Neither of whom considered voting to be complicit in statism. Voting can't even considered to be purely voluntary.
But the strategy of calling people trying to improve their situation in any way they can think of as complicit in the system that has placed them in such a situation is nothing but off putting and callous. And wrong, on top of that.
You can debate about whether its useless or not. I find the blanket statement that its useless is hard to defend given you can't account for every situation. Voting may be useless in some or even most situations. But not all. And if you don't live in the US you haven't seen the cultural shift that vote has caused. Its not all great but its more positive than I've ever witnessed in terms of the prospects for liberty. Republicans are actually talking about ending the income tax now. That would be unheard of just 2 years ago.
But the berating people for voting for the obvious better choice in an election that could have gone either way on a platform mostly of libertarians and anarchists is crazy to me. Do you not think an anarchist or libertarian that voted for trump didn't realize he would do stupid shit?