The more people who actually vote, the more power the electorate has and the greater the likelihood for change. Withholding a vote, spoiling a ballot, or not bothering to even show up, surrenders the little power we get in this world. That people died to give us, improve, and protect. You have to be counted to count. Vote for the world that you want rather than complaining about what we have. We're only stuck with it if they convince us that we are. Inertia is a powerful force for retaining power and privilege.
Vote for whomever you like, but vote.