I am reading through it, am only at about 20% point so far. It seems AI-generated or at least AI-co-authored. I did not spot "slop" yet, except for one mistake. Do you actually see slop?
Unit word per unit meaning is lower than average human, far lower than average technically capable human, the 'hallucinations'/'mistakes' like you said, overall composition and thoughlessness in visual presentation etc. This is unlikely to have seen a human co-author beyond quick skim/scroll.