Right. And that's fine for you if you choose to use it this way. It's fine if you choose to give an artificial handicap to every movie out there, just being clear that this is exactly what it is.
There's a clear double standard in the way you're rating things. If that's how you personally choose to rate things, all the power to you, but no one else is beholden to this method.
1's and 2's will freely be given, and that's something that isn't going to change just because you personally wouldn't give a show a 1/10. Perhaps you've just never seen a movie so bad that it deserves a 1/10, I don't know.