I don’t disagree with you, but it leaves a lot of people trapped in the middle. Can’t vote for the GOP fascists, but hoping that the democrats don’t ever too far left. A multi-party system would let the fringes form their own parties and then perhaps we could get a center coalition that could find its way down the middle. With all the name calling and tribalism, it’s really hard for people to switch. And yes, there are a lot of unaffiliated voters, but the candidates don’t come from the middle, they come from the edges where the advocates are.
As a few other have said, it's really difficult to see "moderate GOP" voters scared to vote for a conservative democrat as anything other than completely bamboozled by GOP propaganda.
I mean, even Nancy Pelosi, the one claimed to be the super ultra liberal that will bring in the new dawn of Socialism is against lowering the Medicare age by 5 years. There's hardly anything "lefty" about the Democratic party and it seems that no matter how many times they try to prove it, voters don't believe them. And "moderate GOP" voters keep voting in hardline Senators and then ask "Why can't congress get anything done?" I don't know, maybe stop voting in GOP Senators and living in the fantasy land where both parties are acting in good faith.
The absolute best thing that could happen for American politics would be where enough Democrats would completely outnumber GOP members 70 to 30 so that the politicians that are actually interested in governing can have a real conservative vs liberal debate and compromise. Because what we have now is completely messed up and is almost all completely the fault of Mitch McConnel, Newt Gingrich, and to a lesser extent Harry Reid imo.
I really don't know what candidate you're talking about "coming from the edges" and no moderate existing in politics. Moderation and Compromise was basically the only thing Biden ever mentioned. And basically every Dem in a swing state all ran on moderately conservative politics. (Can anyone say with a straight face that Kelly, Sinema, Warnock, Ossoff, and Hickenlooper are super lefties?) Compare that to a place like Alabama who traded away the moderate Doug Jones for a complete boob Tuberville.
Dems are really just bad at messaging and loudly announcing what they've accomplished. And of course the GOP have way more money behind them too.