Do you vote for someone besides yourself? I presume you agree with you the vast majority of the time, but it's fair to also presume you pick and choose issues that are important from other-than-major party candidates and go with the one with whom you most agree. Assuming that you do not agree with anyone 100% of the time (a fair assumption), but only go with the people you agree with the most, than you are also picking the lesser of evils. It's simply a matter of practicality. Aside from Perot, who never really had a chance to win, there hasn't been a third-party candidate that could do anything but screw-over another candidate. Not enough people will join the "vote for Humple" campaign - that's just a practical reality.
If you choose to continue to vote for someone who will ensure the greater of two evils is in office, further declining the country at the more rapid rate, that is obviously your choice. It's not mine.
The primary is where your philosophy should be enforced. Pick the best of the field of actual potential winners (Humple, sadly, will never win), and push for that person to get into the real race, and push that person on the subjects that made you go for Humple in the first place. That's my practical advise.