Scammers go to extreme lengths to game the review system and it's a never-ending game of cat and mouse. Amazon and other online marketplaces are spending a ton of money fighting it, but it's a hard problem to solve.
If you receive a bad item, you should complain. Not only will they make it right, but you're helping root out the problem.
I bought some lightening cables a while back. Within a couple months of use, two of 3 had died. (It was a pack of 6, but we'd only used 3.) I went to write a review probably 6 months after the purchase and couldn't because the listing was no longer active.
But the same exact product was listed with an identical (as far as I could tell) listing.
Clearly what they are doing is making a listing and coasting on the reviews made by people within a week or purchasing saying the cable are great and work super well. As the cables die over time and they start building up negative reviews, the just start over again.
I'm someone who reads reviews fairly carefully and doesn't buy products with few reviews (especially if a read of them makes it clear they are fake or bots). But it's difficult as a consumer to combat something like that because the great reviews are real, written by people before the products had a chance to fail.
(Thankfully, the cords were quite cheap. I did get what I paid for, but it was a risk I was willing to take. Other than these items ending up in a landfill, it's not a big deal to me. But it was frustrating not to be able to warn others. When I tried to put a review on the new listing, I got a message saying something like "due to am odd pattern in the reviews for this item, reviews are limited to verified purchases". So I couldn't place a review because I hadn't bought from that exact listing.)