Because it is controlled and funded by the Russian government. There are currently multiple investigations ongoing about the Russian government's undue influence on western media and politics.

As for my "argument", there is none. What's in the article may very well be true, I have no opinion on it.

RT is solid propaganda trash, with some neutral stories to sucker useful idiots into thinking they're reputable, and high production values to make it all gleam. If the story is legit, other agencies will cover it too.

That entire article is a compilation of tweets from an anti-Tesla account. There is not even mention of doing a cursory attempt to ask Tesla for comment, or to further interview the Twitter user. And the article has no byline. That is what makes it poor quality journalism.