It's not even just that people don't know about the green party, it's that we are stuck with a voting system that is inherently biased against 3rd parties being viable.

If we can switch to a better voting system like STAR or approval, it would be far better for the green party.

And the existing parties would have to compete for once, which would go a long way towards making them not dumpster fires.

The Greens are horrible on their own merits. Any third party in the US needs to start out saying the voting system must be changed. If they don't, that's a good sign they're a combination of a grift and useful idiots. The Greens rarely talk about it unless someone else brings it up first, and they quickly try to change the subject after mumbling a few things about it.

Another sign is that they don't try to build up support over time from local and state races. Greens occasionally run candidates for state congress, but for the most part, they show up for a Presidential run every 4 years and disappear.

Their historical anti-nuclear stance has exasperated climate change. They held back something that would have been very useful to mass deploy 20-30 years ago (although I do think the economics have changed, and it's no longer the right option for new rollouts). The German wing of the party is currently cheering on the dismantling of perfectly good nuclear reactors in exchange for much, much dirtier sources.

Nader's campaign in 2000 absolutely did torpedo Al Gore (and no, you don't have to convert every Nader voter in Florida to Gore for this to be true). He kept power out of the hands of one of the most genuine public servants to run in recent history, and gave power to a trainwreck of an administration that was 180 degrees away from their stated goals.

Greens need to get serious or fuck off.

The Democrats are nominating a genocide denier though. Similarly to pretty much every election for the last 50 years. (Not genocide specifically, but a candidate with major issues in their beliefs). Voting blue simply allows them to continue ignoring us. It also lends legitimacy to the winner. If the 2020 election had seen Biden win 15% to Trump's 10%, that'd be a much better case for Biden being an illegitimate president. When you do average things, you get average results. There is zero reason to think voting blue is ever going to fix any of our problems, because it hasn't so far.