Here’s another example for you: it would’ve been unthinkable in 1996 when a Democratic President signed the so-called and repugnant “Defense of Marriage Act” into law that about 26 years later, support for gay marriage among Americans would be over 70%, and that a bipartisan coalition of Senators could get behind a bill to enshrine same-sex marriage into law, but here we are. https://en.m.wikipedia.org/wiki/Respect_for_Marriage_Act
Nihilism doesn’t do any good for anyone. If you live in a heavily gerrymandered state with climate deniers elected to a majority of seats, start volunteering with a group that seeks to eliminate gerrymandering in your state with independent redistricting commissions.
Government is useless and f*cks up nearly everything it touches. People need to do it themselves now.