Turns out, if you're further left than either realistic candidate (because FPTP), it makes it really easy to figure out who you should vote for. "I wonder if I should vote for the person who's not left enough for my liking, or the one is so far beyond that as to be the diametric opposite of left. Whatever shall I do?"
I don't understand how the Democrats in USA can be considered left-wing. Sure, they are more left than the Republicans, but in my eyes they certainly not left-wing.