Taking a wild guess here, I suspect people not voting comes from a number of addressable causes. Here in the States, we are far more enamored with capitalism than Democracy, and the way we regard our civic duties (e.g. trying to get out of jury duty, mostly due to the hardship it would cause by skipping work without pay). We work our labor class so hard they are too exhausted to parent, cook or engage in health activities, much less engage in civics. It doesn't help that this is exactly how our plutocratic masters want it.
After we address allowing people the time to think about what they want from government, and voting accordingly, then we can start looking into giving the people actual agency in their destinies, toward which election reform is only one front.
But all this is to say the United States doesn't really try very hard to get the people to engage in civics. Rather, it would really prefer that we lie down and let ourselves be ruled by the wealthy according to their ideals and business interests. That, of course, brings us back to the same problems feudalism has: one Joffrey or Caligula or John of England / Richard II can bring to ruin all that a dozen prior generations have built up. Even Charles III is living up to the traditional standards of monarchy, and the UK has a parliament and a constitution with which to keep his shenanigans in check. (Parliament is up to its own shenanigans to turn the UK hardline fascist, but that's another discussion.)
In elementary school government and western civilization class, we learn that we vote so that the government does what we want it to. But we quickly learn (sometimes as soon as intermediate or high-school) that our agency in selecting our government is very, very limited, and historian careers have been built on the corruption of government into an oligarchy with trivial democratic features.
Except right now, those trivial democratic features are the last line of defense between the two party state and a one-party autocracy. It's a state of affairs that shows not only did we take a wrong turn, but we're on a fast train to somewhere we never should have gone. Curiously, the never-Trump conservatives have been pouring billions into the proverbial railroad that lead us to Trump and the next line of Musolinni-wannabe strongman dictators. They didn't just buy the ticket, but laid the rails.