People have been using your rethoric since Hillary v. Trump. It didn’t hold up then and it doesn’t hold up now, and the GOP won because of it. Gaining more 3rd party votes since decades, the DNC lost even with a majority vote.
The system is fucked, with that I agree, and there is one party trying to change it and one trying to abuse it.
I hear you, in a system where votes are distributed equally and where a duopoly isn’t an eventuality, you’re absolutely supposed to vote for the party you allign most with. The current system does not permit this, causing a black and white world of politics. Not participating in this is your right, and with two regular candidates, we’d probably never have this conversation.
One party has the rationality to change its opinion and work on mutually beneficial solutions, and the other party polarises the population, advocates for violence and creates lies and deceptions at every corner.