It is both.
Voting is a good system. The alternative is "let's just have a fight with guns, or with money, or connections to powerful people, every time there's a disagreement."
The problem is that we delegated the process of informing people what to vote for, to absolutely rotten media. And we delegated the process of figuring out the details of putting some candidates forward, to an absolutely craven, useless, and corrupt class of full-time political operatives who generally don't give a shit about the people.
We need to fix those things. And yes, getting organized labor to fight back whenever they are fucking us, which is pretty much every day, to add some bite to all those polite ballots we're sending in, sounds great.
But voting, as a concept, is good. It doesn't have to be either or. It can be a 10-day general strike, and also voting to get rid of the guy who wants to nuke Iceland, and also organizing our politics better, for some candidates that aren't so shit as these ones generally are. Each one will help the others get done.