This is the real answer. When we are stressed, depressed, anxious, and feeling hopeless, we can either turn inwards and retreat from society, or we can lean into our friends, family, and community.
If you have no community, now is the time to build it. A lot of liberals will be desperate, and that means it’s a great time to shake off the lies of individualism (we are all individuals part of a community) and develop the truth of community. Otherwise this cycle will continue the way it always has.
I could see maybe getting it implemented outside the federal level, but in all honesty the slow change in culture that would develop from a new voting method wouldn’t be nearly enough to make the gigantic changes required, even if we are talking about keeping America capitalist.
If there were larger organizing efforts, much like that required to get ranked choice implemented, which had ranked choice as one of the demands, then yeah I could see big changes happen.