Fascism.
People have been lied to for decades and we all know it’s going to get worse in the future. The democrats are neoliberals who will continue to exploit people. The news media and social media are all owned by oligarchs. Wealth inequality is getting worse. Climate change won’t be solved and will make all things worse. Why should people vote for the status quo? Work hard, get fucked? No solidarity, no rational action, no plan. And nuclear war when?
Fascism and nationalism is not just something to break this but also has the better story. Something the stupid masses can believe in again. Trump is telling them everything they want to hear.
You’d need to grow the third party / greens by having them become a viable party in local elections and state elections first. The greens have failed to do that. Which means they have no chance except to spoil the election.