I don't see how that's relevant to my comment? I've been using that site for many years for media I'm unfamiliar with and it's only somewhat helpful, and its current ranking of the Graun says nothing about its partisanship (or bias, which in their usage is a misnomer, in my view).
I can pick certain topics and check the Graun to see whether they ever deviate from positive or negative on those topics. That's partisanship, wholly different from where they land on the political spectrum.
I was chiming in to the broader thread not just your comment but I think it adds to your observation about the political bias.
I'd love to get a higher quality source of data on media bias and accuracy. Both of these matter because even reporting facts but emphasizing a certain perspective distorts reality. Inaccuracy or straight out making stuff up is another form of reality distortion.
Fair enough. I'm hopeful that with AI we can get better metrics (although it'll probably add another layer of bias!)
As to the distortions, the only defence against that appears to be to read a wide array of sources. I stopped reading the Guardian after one too many straight up lies but I certainly can't say they're the only ones.