but at least they win and are executing on a plan to gain power

Yeah, gaining power in service of genocide and the persecution of immigrants

But I don't really see any material reason to donate or promote the Greens.

Anything that reduces the power and vote share of the two parties is a material benefit for the working class, even a shitty green party getting a slightly larger share of the vote falls squarely under the harm reduction rubric left libs love to chirp about

Death by a thousand cuts is the best the western left can hope for, and every cut counts