I just meant that it wouldn't matter which system we use, the less popular party (which for 30 years, has been the Republicans) will always find a way to blame losses on anything but themselves and their policy. So if you have to claim 10,000 illegals voted in Florida to give the other side a win, you do that. If you have to claim there are 15 million illegal votes in the whole country as the reason you lost, you do that. Once your side believe the small lie, scaling up isn't too much of a problem. And if you only need a couple thousand useful idiots in the same place to successfully stage a coup in your favor, then that's who you aim for.
As for who would run elections, well....you'd need a way to break the current 2 party setup for any real change. If the losing party realizes that all they need are a few hundred True Believers in the right spots to swing any election however they want, I don't see an easy fix no matter how obvious the solution may seem.
But how bad does it have to become for the Great Apathetic Middle to actually care? If there's a coup, but it's peaceful enough, will they stand up to it or will they just accept their new fate if it's less work? How many people, just 1 year on, actually still care about 1/6? They failed a coup, but there were minimal casualties and a few low level schmucks are being given some punishment. Nobody with any real power has faced and consequences, and they learned a few important lessons for next time.
And if it's "not that bad" for long enough, when The Middle does rise up, do they pick the side already in power (even if illegitimately) simply because staying the course will be less disruptive to their life than the alternative? I mean, look at Virginia. Am I supposed to believe that the parents that voted out the sitting governor simply because enough suburban moms wanted their kids to go back to school building during the day but also think teachers are brainwashing their white kids to hate themselves because their kids learn racism is a thing would give a **** about a coup attempt that barely affected THEIR lives?