They've always had more coverage of Tesla than other automakers, or at least I've always noticed it more. When Tesla was leading EV sales they dutifully reported that, when they're dropping they report it just as well. If anything slanted coverage would be reporting less on Tesla because they are doing badly, which seems to be what you want.

That is an incredibly tortured sentence. I'm not really interested in parsing tone in an article, that's very subjective. I would be interested if you could demonstrate that Ars was choosing not to write articles about factual things that would portray Musk in a positive light, but you instead basically said "If you ignore all of their positive factual coverage, they don't publish anything positive about Musk at all!"