No, I don’t think it’s “the wrong time” for a Third Party vote. Now’s when it might be most necessary, because of this carnival of spectacles designed to keep voters misinformed and fighting each other.
You’re fired!
Tamar Salibian

If nothing else, a third-party vote will help signal to the two main parties that leaving the electorate with nothing but poor choices will not work in the future, and that they could only expect to lose more and more voters.