Isn't there an asymmetry here?
I mean, aren't the people who see climate change as a DEFCON 1 emergency way more motivated to support environmental causes than the... um people who think it's a hoax are to oppose it?
Are there people (not oligarchs) who really oppose environmental causes? Or isn't it just bundled up with all of the GOP's other value propositions? And the constituents just include it because tribalism?
edit: my point is that it's us versus the oligarchs. This is not something like guns or abortion or hell even fiscal policy where individuals are going to dig in their heels. This issue is less partisan in that respect. I don't think it's a big deal to the right beyond being a part of their caricature of the left. Sure, some have bought the narrative that the economics are somehow bad for US. But that's a weak and indirect point, and one that just isn't going to activate grassroots opposition.
Also, find a local group that supports the same policy aims that you have. There are lots to find, especially compared to just 100 days ago. Join up with them and see how you can help amplify each others' voices.