@revelette1,
Sounds like sour grapes to me. The DNC can't support every candidate and they seem to have made a decision to support moderate to conservative Dems in districts where they feel they need to recover Trump voting Democrats.
It may be, as someone in the article suggested, that those voters are lost forever, but if they are not, running Youngblood will push them further away. It's a strategy that seems to have worked in PA. with Lamb so it's not crazy.
The party can double down on the left-wing ideology of its progressive segment and continue to lose seats that are in play or it can run the candidates with a shot at winning, but who still have a "D" next to their name. A majority in the House and Senate with a handful of Blue Dogs will get more Democrat agenda items accomplished than an ideologically "pure" minority.
Personally, I wish they would follow the advice of folks like you and edgar, but you seem to think people like Youngblood can win in red districts. Do you think one would have had the same victory than Lamb pulled off?
Perez is the Chair of the DNC and he sure sounds like a left-winger. Either he's a figurehead only or not quite as ideologically pure as he would like you to believe.