This reads exactly like bad plagiarism, with the word count padding repetitive phrases and too-on-the-nose facts. It's not generating, it's memorizing.
Are you also saying that it is plagiarism or that it just look like it? To be honest considering the huge training sets and knowing nothing of the testing methodology I have some lurking suspicion that it could be just copy-pasting chunks of texts...
On the other hand if it is just writing "articles that feels a lot like they are plagiarism" then I suppose it doing its job properly considering what you find on the internet.
Well to be fair it's learning from the internet, where there are lots of low-information content and repetitive web pages. I think also the lack of formatting makes things seem more artificial than they are.
https://read-the-samples.netlify.app/sample_1792
This reads exactly like bad plagiarism, with the word count padding repetitive phrases and too-on-the-nose facts. It's not generating, it's memorizing.