I've never understood why online reviews, at least on sites as large as Amazon with a competent technical team behind the company, aren't better. First step, i

I've never understood why online reviews, at least on sites as large as Amazon with a competent technical team behind the company, aren't better. First step, if I review a product, then you should immediately be weighting the visibility of all reviews by reviewers who posted a review which agrees with my own. So if I rate Avengers: Endgame bluray a single star, guess that I have similar opinions to the others that rated it the same, and when I go look at some other Marvel film bluray, if those others have reviewed it, push them to the top. As I review more and more things, the weightings should get better and better. And gaming it would be basically impossible unless you managed to tailor bot posts to match the way I rated dishware, movies, books, videogames, food products, and the dozens of other things I've rated. Fake reviews would get pushed to the bottom with almost instantaneous speed if they would do this. If they cheap out and decide to aggregate and 'bucket' reviewers rather than training a recommender engine per-customer, its performance will fall short and still be gamed, but even that would be better (and seems to be the way big companies handle the computational load per-user systems would incur... personally I'd prefer they push the calculations clientside, but they haven't gone that way).