Honestly, and seriously, what exactly is your problem around this. Go run a series of benchmarks at stock settings on a bunch of games and cpus, are your numbers wildly different to reviews out there? No, then serious get a grip with this "no one can review it but you" nonsense because it's insane. You work in a store where you have access to and test kit, for all intents and purposes everyone else here has to spend this stuff called money to get these products and the only way to review them, as you suggest, is buying every single cpu from both companies on the market, test them and then return them all except the one you want?
That's not how the world works, it's insane to push that idea. Reviews are mostly pretty close to each other and outliers can be spotted a mile away. One reviewer might be an Intel shill and use the wrong memory settings to reduce performance, even then it's probably going to lose 2-3% performance, not 50%. If you think reviews can't give you an exceptionally good idea of the performance of what you're buying, then how do you expect to sell products to your customers and how do you think you don't have 95% of products returned for failing to live up to expectations.
It is extremely easy to read a few reviews from different sources and know what performance a product has, implying this isn't possible is just being dishonest. If 5 reviews all show lets say a 3800x beating a 9700x in Cinebench, you think that result will change if we buy and test it for ourselves, you think somehow the scores will be 10% higher or 25% lower and we got tricked into buying the wrong CPU? I honestly have no idea what planet you're living on if you think all OCUK customers should just randomly pick parts and test for themselves as reviews are apparently not any good.
A 3800X will perform the same in the Anandtech system, as the techpowerup system, as my system. if I want a 3800x for working with Maya, I'll check a few reviews that use Maya, if I want it for gaming, I'll check several reviews that have gaming results and if I mostly play RTS or FPS I'll compare the performance in those games. That's how 99% of the world makes decisions on buying products.
The whole point of "review culture" is that, a few people get all the stuff and compare them so that every single user doesn't have to. Because a few hundred people doing that around the world means millions of people don't have to test every single chip themselves.
It's worth pointing out that you seem to post a lot of negativity around any AMD product being launched and don't post that with Nvidia/Intel product launches.