I don't mean to be mean, but you need to talk to more people.

A lot of people in America simply do not believe they can change anything. Either because they don't know how, they've never shown up to a town hall, or because the only politics they hear about are from states and federal buildings they'll never live or work in, or because the only politics they hear about outside of Trump being a dipshit is some 2% thing that will do something which might lead to something else maybe, or because South Park taught them that caring about anything is cringe and, actually, the smartest people spend all day making fun of anyone with an idea.

I mean, let me ask another question: how the fuck do you lose interest in unions? And yet, the US lost interest a looong time ago.

Mostly they just want both sides to burn down and be replaced with something less horrible

But the right has enough supporters to win.

And at this point, short of the SCOTUS getting overthrown before the finish, ushering in fascism, all the politics are just arranging deckchairs on the Titanic.