Hmm, no idea.
Are they competing with FIDE's coverage? It is another one of those "we have the exclusive rights, you can't broadcast it" vs "f*** you, we're broadcasting it anyway" things?
If so, maybe FIDE loyalists downvote it.
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Yeah Carlsen acts like a child sometimes, but I don't care. When you're the best in the world what would normally be an ego is actually just an accurate self assessment (i.e. "I'm the best in the world")
So when someone tweets that Kramnik knows more about chess than anyone, sure, as the best player in the world I'm probably going to tweet something like "if he's so good why was he WC only 1 year, why am I rated higher, and why do I have a plus score against him?"
It certainly isn't the proportion of dislikes that I'm used to seeing on a chess video:
https://www.youtube.com/watch?v=wtg4Iajz-WE
So why the negative response? Is it because Giri's wife is commentating, which makes some of the Carlsen fans mad? Because that's the only semi-plausible reason I can think of (maybe I'm not very imaginative). Or is there something else, perhaps less petty (or more - it's possible), that I'm missing?
While we're on the subject... is it just me, or does Carlsen seem to constantly get mad about things that I wouldn't even think to be annoyed by? Just putting it out there.