The human element of perception is inherent to reviewing products. I might think something is genuinely better than you because it meets my needs better. Or because you got a bad part in yours through sheer bad luck. Or I had a migraine that day.
I usually just try to google whatever product I am trying to understand and read a few articles and try to at least hone in on what might be the most authentic or at least reviews that are well-written and seem to care about the product.
But there's no perfect system. I went through this whole process trying to figure out the best mattress and at some point you just gotta give up and say hey they're all basically glorified piles of hay let's just do this.