their socialist/progressive third party that gets one vote every election will definitely overtake both Dems and Republicans

The idea isn't overtaking both parties in an election, it's showing the democrat administration that their votes are actually conditioned to doing the absolute bare minimum like, you know, not enabling actual genocide. By "voting blue no matter who" in the "most important elections in US history" (a pattern that starts to repeat itself too much, you can't call every election the most important one), and by voting exclusively on damage mitigation, is how you get the slide to the right of the democrats (and republicans) over the past 5 decades. By not showing that your support to democrats is conditional to, you know, progressive policy, you're giving them a license to enact whatever brutal murderous genocidal policy they desire, since they know it won't have an electoral consequence.

That's how you get the candidate for the democrats saying on a rally that israel has the right to defend itself (again, during the ongoing genocide of Gazans and soon Lebanese) and that the US should have the most LETHAL fighting force in the world. Not effective, not powerful, not even the besr funded. The MOST FUCKING LETHAL. And the crowd bursts into chants of "USA, USA, USA". I don't know how that looks to Americans, but as a European, saying that you want your military to be the most lethal, and the crowd chanting the name of the country, is something I would expect of, idk, Nazi Germany.