Let's look at the divide from a different angle for a moment. Right wing anger resembling fascism is on the rise because it fills a vacuum left by the absence of a Left. The present divide in the US is misunderstood as one between Right and Left, or as either an interparty or intraparty struggle.

It's actually a divide between those clinging (clinging because most understand capitalism is on its last legs) to status quo neoliberalism and those who are fomenting and exploiting misplaced anger for purely selfish reasons (creating scapegoats is always key to right wing populism). The former are a mix of ideologues from both parties (the only major difference being Dems are willing to support social justice in so far as it doesn't threaten predatory capitalism). The latter aren't driven by ideology. They're just greedy purveyors of chaos. Which is not to say greed isn't also a driving force for the neoliberals, because it absolutely is.

Hyperindividualism (Thatcher and Reagan argued there's no such thing as society) and relentless attacks on the collective have largely neutered any ability to redistribute power or democratize institutions. Likely the best answer to this is building communities of solidarity on a small scale, experimenting with everything from ecovillages to sortition to worker-run co-ops to participatory budgeting. I wouldn't tell anyone to not bother voting in elections, but - like mainstream media - mainstream party politics is simply not worth much time and energy.

Feudalism gave way to capitalism, which will give way to a new system (for one thing, climate change on this finite planet and continued automation are among the factors that will make it increasingly difficult to exploit wage labor). What exactly that will be is to be determined. But the ruling class will absolutely side with fascism over any sort of ecosocialism.