If your purchasing decision is based on ratings along that is pretty sad, I read what the product can do, tech specs etc. The reviews are just icing on the cake as it has always been all over the place with too many variables. I don't necessarily see it as broken, any system needs to be revamped and evolve. That is what Amazon, Apple, etc are doing.
Why are you reading unverified reviews with one star ratings, are you just seeking the negative to align with your preconceived idea of that product. It is human behaviour to look for either the positive in a product to reassure themselves that their initial decision was the correct one. I suspect that is why you are looking at one star reviews. I look at where the majority of the rating fit. For example if the APP has 50 ratings and most of them are between 3-4 stars then I know that some who have had a poor experience was maybe due to some other issue or user expectations, similarly goes for those giving a 5 star rating.
I mentioned that one does not have to spend 10-15 mins on reviews when there are filters, I am an analyst I know how to pick apart the key information for a whole lot of noise, I suggest to sharpen your online product reviewing skills will save you a lot of time and you will stop complaining about a broken review system.