Google search results are absolutely littered with fake review sites that have never actually have tested the products they claim, usually just reiterating the Amazon product pages (which is only obvious once you know that this is a thing). It's extremely hard to find a real review in a product category you are not an expert in to the point where I have just given up.
Something i've had success with is finding the appropriate subreddit for that product category - they'll often have a "simple questions / what should i buy " sticky thread or the sidebar will link to some infographics about the established best buys at various pricepoints.
I have the mindset now that when I want something that I would otherwise look on Amazon for, I search for a specialty online retailer who will (of necessity) beat Amazon and local businesses in all respects, from reliability to selection. For instance, if I want chocolate, there is a site devoted to chocolate. If I want car parts & accessories, there are sites specializing in that. If I want computer cables, there is a site specializing in those. It's a given that everybody has to compete with Amazon, so non-Amazon retailers, if they're well established, tend to be really good in their niche. I think this is actually an overlooked positive externality of Amazon's dominance.
GP's message is about lack of legit reviews on Amazon when searching for wireless headphones. You are talking about doing an internet research for wireless headphones. They are two separate topics.
I see what you are trying to say: "Do your research somewhere other than amazon", but one of the major problems is if you order from amazon you risk receiving a counterfeit item(whether expensive or not).
In Romania shipping takes a lot and prices are higher, so I prefer ordering from Amazon Italy or Germany and I get the same price even though I also pay for shipping
