Every single example you listed was spearheaded by Democrats or Progressives but then blocked by Republicans.

You mean spearheaded by progressives and blocked by establishment democrats? The parent comment’s soapboxing is weird, but Democrats would’ve done all the things they listed if they actually wanted to. And before you bring up the filibuster, they could’ve simply abolished the filibuster, but they don’t because then they’d lose their excuse for why they don’t do shit.