I'm not advocating for people to accept the lesser evil, I'm asking them to understand that their vote is no longer a form of acceptance - it doesn't hold enough power for you to use it that way anymore. Your acceptance or rejection of the system comes from your actions outside of the polling place, in the form of protests and what inevitably comes after protests if they're ignored for long enough.
A vote in the presidential election currently only holds the power to slightly shift the current power between bad and worse. It's like the trolley problem - there's no real 3rd track right now, no matter how much we want one. If we start building one now at the local level, maybe there will be one for someone later, but we've gotta make our own lever choice without it for now.