I never said that many of the dislikes weren't valid.
What I said was that after a certain point you have to ignore them because they don't matter anymore. Any possible feedback to be given through the dislike of something gets lost in a chorus of vague anger.
The like and dislike button are vague metrics to begin with but when everything you put out just gets insta-bombed with nothing but dislikes then the people hitting that button aren't making a judgment on the content. It becomes meaningless.
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And what does WC3 Reforged have to do with a WoW cinematic then?
It's not judging the content, it's just generalized anger which is not only unconstructive but it just doesn't matter.