Earlier quoted context omitted.
There is no need to create a Grand Unified Theory of misinformation, here. This problem isn't that hard. You filter this stuff and rank it by its SOURCE, not by the content of individual articles. It's not hard to figure out which online sources are pushing out most of the abjectly-bad propaganda, and de-rank them.
Sorry. Most of the official sources in this recent campaign were dead wrong on a lot of issues, mostly because of their own massive biases.
Facts can be presented in a biases way (generally through omission of other contextual facts), but if what is said is factual, at least that bit of information is still correct. If combining multiple sources to generate a grouping of facts, that presentation bias way well disappear. If system weeds out people that present opinion as fact, all the better.