A movie like "Suicide Squad" was (to me at least) highly enjoyable, though I thought it objectively had many problems with plot and delivery. I would probably give it 3 stars, which is relatively neutral for me (or leave it altogether unrated). If it were thumbs up/down, I would probably have to leave it unrated completely.
Maybe that's an improvement, but the more discussion I see around this, the more I realize the futility of single-axis metrics for things like this, until and unless you're asking a single question "Did you enjoy this movie" is a much different question from "is this a good movie" -- and I don't really know which one I've been answering on Netflix all these years past.
3 stars = "not a bad movie, but wouldn't recommend"
4 starts = "decent movie, would recommend"
5 stars = "great movie, would definitely recommend"
A binary choice doesn't have any weight to it.
This is actually rude of you, bordering on ridicule. He explained very clearly why he is dissatisfied.
I'm worried about the thumbs up/down, as Netflix has increasingly recommended shows I do not like this year, and I don't think the thumbs solves the "rating for perceived quality" issue. I've been using Movielens for recommendations a lot instead, and it seems more accurate for me... and it has enough stats to show that on their site, most rating is not binary, much closer to a normal curve for average movies or a linear graph on really good movies. (It lets you see the distribution curve on individual movies, and other metrics.)
I thought that Neflix made it pretty clear that the ratings were used to choose which content to show me. So I should only rate based on what I'd actually like to see.