I wouldn't necessarily mind it being partisan, if not for the extremely low quality commenting standard. I'm sure there's a causal link: most of us are less likely to call out bullshit from our own team, and when there's nobody to call you out on your bullshit (so long as it's directed at the correct targets), it's tempting to go ever cheaper and ever dumber in search of easy approval. But it would at least be possible to have a forum where people had a lot of opinions in common, but still cared about truth and intellectual integrity and basic logic.