This seems like a false correlation. The kid's behavior got better bc he was in a safe, caring, consistent environment where people took his behavior seriously but didn't give up on him. Watching/not watching Ninja was just one way this family demonstrated that.https://twitter.com/voidrantsback/status/1230270806787125248 …
I don't doubt that Fortnite/Ninja was an important part of the dynamic with this particular family, but it's a big stretch from that to saying watcing Ninja causes angry outbursts in traumatized 7 year olds.