

I also grew up in Missouri, though I live in Kansas now, and I know several people who fit that description.
The thing that kills me about Missouri is that it used to be a competitive state for moderate Democrata, but the rural chunks of the state fell victim to right wing populism during the Tea Party wave in 2010 and now there’s a whole generation of Missourians whose defining political characteristic is rancorous hate for “liberal” city people. Kansas’ politics aren’t great, either, but at least the rural voters care about farm issues here… In Missouri, particularly south of I-70 where the only real industry they ever had was lead mining, all that’s left is the hate they’ve been fed from right wing assholes.
In anything like a competitive district, a progressive Independent challenger is more likely to split the vote for a milquetoast Democratic incumbent and hand the seat to the Republican challenger. Working within the Democratic primary system has its challenges, but also clears the field so that there’s one clear choice for left-leaning voters rather than two.
First past the post sucks ass, but it’s what we’ve got to live with until we’ve got enough power to change it.