When has the Graun published bald-faced lies? It has an editorial slant, for sure, but it's not a fountain of factual untruth.
I think the idea stems from the way the Graun has opened up it's 'Comment is Free' section which has lead to quite a few low quality opinion pieces particularly 'SJW' esq ones.
The actual reporting from the Gruan is still good quality in my opinion, certainly head and shoulders above the DMs. And whilst the Graun has its left bias it, quite rightly, hasn't been kind to the current Labour party.