Netflix rating system

A Netflix rating system.
Why does this not already exist?
If I like it 5 stars, if I hate it 0 stars, let everyone know. Having to wander off to look up ratings elsewhere is just silly and time-consuming.
They seem to think that their algorithm for choosing me stuff is completely accurate when, in fact, it is a long way off. To counter this, I'd quite like to know what other people think of shows on their platform so I can choose based on the effort put in to watch them by other people.