I don't see this much with Yahtzee, but I know exactly what you mean, TC. I don't get it either. I'm a huge fan of thatguywiththeglasses.com, and there are people who lose their freaking minds when someone on that site trashes a movie or game they like. I even read a comment by someone who said he loses confidence in his own opinion by watching the reviewers on the site. Wow.
First of all, it is okay to disagree with people. You don't have to get all bent out of shape because no one realizes the cinematic greatness of Street Fighter: The Movie like you do. It doesn't mean the reviewer is right or that you're wrong.
Second, and more importantly, who cares if you are wrong? So what if you like a terrible movie or game? If you like it, you like it. I own and love the Mortal Kombat movie(Not "Annihilation," that's disgusting.), and I died laughing when the Nostalgia Critic tore into it. He's right. It is a bad movie. I still watch it, and I still love it.
There's no reason we should be at each other's throats because we have differing views. If it bothers you that much, ignore the person and keep loving your movie/game, but finding out you're wrong about something isn't always bad. You'll never learn anything if you keep shutting out people who disagree with you.