There were literal user ratings. If you clicked on details you would see reviews by real people, and could quickly tell if it was complete shit.
?? The stars are from user ratings and they are not misleading in anyway. I use to see if the movie is at least 3.5 then I would watch it and it will be fine movie. Now the matching system is so bad that almost 90% of the movies I watch are bad. If it doesn't work for you then it doesn't mean it is misleading.
Huh? The stars were user ratings, so someone else could waste time establishing that the movie/show was shit so you wouldn't waste yours. They removed the star system cause low ranking things obviously weren't going to get more views cause it's established that they're terrible.
I don't even know what a match percentage really means in current Netflix.
As for the OP, lets say for the sake of argument, that Netflix considers Infinity War a 1) Superhero Movie and 2) Action Movie. You're saying it's not both and it has to fall into just one category? That, in itself is weird. Of course there's overlaps.
These have been addressed by collige here:
AFAIK, there was never a rating system, the stars just did the same thing as the match % except more misleading.
but it's worth re-emphasising this. It's absolutely incorrect that the star-ratings were user ratings, and the fact that people thought this is why the new system is far superior to the old system; people completely misunderstood (and still don't understand) what the stars meant. In a simplified way, the star ratings previously were what Netflix thought you would think of a show or movie based on how you've rated other things you've watched, what you've watched, and what other users with similar taste think. That so many people thought the stars were reflective of Netflix users' opinion of the show or movie is why it was such a terrible system.
This is just how the matched percentage display works at the moment, except not only is it much clearer what it means but it boils things down to the binary choice of whether you liked it or disliked it (so people don't give a three out of five to something they think is good but not a masterpiece, only to spend much more time watching items they consider three out of five and throwing off the entire algorithm).
The star ratings which showed previously differed depending on whose Netflix it was. Breaking Bad might have showed as 5 of 5 stars to me because of what I watched and how I rated things, but it might show up as 2 of 5 stars on your Netflix account because you've an entirely different taste.
Netflix previously had a review section, and this added to the confusion over what the stars were, because individual reviews (by those who chose to make them) were displayed with star ratings over review, but this was hidden within the menus and very infrequently used (and didn't reflect what you saw as the star rating).
EDIT: See for reference:
https://www.businessinsider.com/why-netflix-replaced-its-5-star-rating-system-2017-4?r=US&IR=T
Netflix's star ratings were personalized, and had been from the start. That means when you saw a movie on Netflix rated 4 stars, that didn't mean the average of all ratings was 4 stars. Instead, it meant that Netflix thought you'd rate the movie 4 stars, based on your habits (and other people's ratings). But many people didn't get that.
"That's not the way people are used to using star ratings on e-commerce ratings" Johnson said. Take Amazon, for instance. "In those contexts, those star ratings are an average." People assumed Netflix was the same.
EDIT:
Ratings by real people? I don't think Netflix did this. Ar least not on the UI I was using there wasn't a way to submit a rating other than a star score.
Netflix had a review section where you could submit a review and a star rating associated with the review that could be visible, but this didn't appear unless you went into the item and went to the review section. This isn't what most people mean when they talk about the star ratings that appeared in the UI though, which as you point out weren't ratings by real people.
EDIT 2: It's also worth noting this is why the impression of Netflix lying about their content volume likely exists. As mentioned the categories generated are based on your viewing habits, but also the content that appears within those categories is generated based on your ratings and viewing habits. You don't see everything that would be marked within those categories, only those its recommendation algorithm thinks you'd be most interested in. A very clear example of this is in how you don't see items with under a 50% match in your feed.