It doesn't seem to be LLM, but reads like one. The author is German, maybe it's a language expertise thing, maybe he likes the LLM style (unrelated to his nationality).

But yeah, sentences that only have 3-4 word each feel like 3rd grade writing; I couldn't read it.

Hey, I've always written like this. In school I couldn't stand subordinate clauses and long sentences because I'd lose my train of thought. But yea, I've noticed that people often find it hard to read so I'm going to work on that