There is no such thing as a wasted vote.
Vote for who's policies are the most aligned with yours. If none appeal, spoil the ballot paper, it'll still be counted. If you whinge about the state of things, but not use your right to vote then you're to blame.
What happens when ballots are spoiled? I've seen others suggesting this... but I can't see any positive benefit of this over voting for the "least bad" candidate