the fact that YouTube hasn't had anyone step in (except to change channel metadata, which the "hackers" have played into with their new stream titles) and the streams are still ongoing shows that their response times for account compromise are terrible

they could have just not allowed a huge verified channel to be able to have their username/display name changed so freely, they could have caught out "Tesla" as a name commonly used in scams, they could have someone at Google's moderation team who can freeze the channel's activity (considering a channel with a recent strike can't stream at all, this should be *trivial*)