I think even in the mainstream scientific circles, it is accepted that peer review doesn’t mean very much any more
I work in a "mainstream scientific circle" and as I said in my reply to you - low quality work does get published (& hopefully retacted). The existence of predatory journals means yes you can effectively pay to get something published which is utter trash - like Aseem Malhotra and many of his ilk.
This does not change the fact that it something published in a peer reviewed journal is still more likely to be higher quality than something lifted from a preprint server - anyone can upload a document there.
But I'm not sure what point you're trying to make - you linked a scientific paper which you mistakenly think backs up your point. You are now swerving to say quality of science is low and peer review is meaningless.
it takes me an hour or so to look at a study to work out if I think it’s piss poor
Baffled by this when I work as a scientist (which includes writing & reading such papers) and already said it would take me ~5 hours to properly read a manuscript.
You can read, evaluate methods, check results, critically assess, follow up references, go through the supplementaries in an hour? Is this every field or just mathematical modelling?
I am suprised that in this hour you didn't notice the many grammatical mistakes, basical epidemiological errors, or the fact that it provides no empirical or referenced evidence that backs up your claims though @BeethovenNinth