None of those news outlets you mentioned are "hard left". They are corporatist status quo. They are all in support of Joe Biden who is hardly "left" at all
He is the opposing candidate of the current president, however. And why should we trust news outlets that are blatantly in favor of one candidate over another, and bury stories that look bad for their favored candidate?
It's a relative measure - left compared to Fox. Not left compared to SZ or Haaretz.