"Dislike" doesn't mean hate, personally I've only downvoted YouTube videos when they were badly made, or badly presented to the extent that almost any other video on the topic would be better.
It's not about hate, it's a signal that the video is probably going to be a waste of time for the watcher.
Absolute nonsense. You've obviously never used Youtube for anything educational if you can't see the value of the dislike button.
This comment is loaded with 'well meaning virtue' but ultimately it does more harm than good. You're taking it away because some celebrity you like got sad because their video got disliked? Bloody hell.
Making better tools that will detect and manage downvote bombing and hate should be fairly simple if Youtube could be bothered by any of it.
Removing the absolutely needed and valid functionality that is normally used to signal the quality of the content, and save viewers' time, for all users and all cases, should not be the justified sacrifice, just in order to mitigate one bad way to use it.
It's not about hate, it's a signal that the video is probably going to be a waste of time for the watcher.