The dislike score is a relic of the past. A dislike is a measure of how bad google did at showing you content you expected.
Type in show boat videos and they show you a love boat video so you hit dislike. There was never anything wrong with the loveboat video, it was just shown to someone looking for something else.
A dislike is a signaling of my general satisfaction with all aspects of that video. Content is poor? Dislike! AI recommendation was poor? Dislike!! Too much advertising? Dislike!!!
Type in show boat videos and they show you a love boat video so you hit dislike. There was never anything wrong with the loveboat video, it was just shown to someone looking for something else.