As much as I hate the two party system, the Green Party of America is an absolute joke.
In the 17 years since they were founded, they have only won 5 state legislature seats (the highest office a green has ever held) and every single one of them changed their affiliation to democrat or independent shortly after winning.
They have no interest in party building, organizing, or educating the public. They run absurd candidates for offices way beyond their skill level, the special election in Ohio is the latest example. Their high point was the Ralph Nader candidacy, in which he received 2.7% of the popular vote
In theory, the Green Party is vitally necessary for a two-party system with party platforms so rigid and legacy-laced that not all potential candidates can get with either of them. I get it.