I'd say then you don't understand the purpose of on-the-ground political organizing or what it looks like. It's not about changing the whole system in one go, it's about radicalizing as many people as possible for a grassroots movement. You use that to get local politicians in power favorable to leftist causes. Then you apply pressure upward.
We're currently more radicalized as a country than we've been since the Red Scare. Just because the progress is frustratingly slow does not mean it isn't happening.