system
A chat on subreddit /r/me_irl
human
IMO, anyone who says one piece is excellent, Either refers to the first half of the anime. Or the manga as a whole. Those are good. Currently, anime is not as good as it used to be. While the manga keeps itself at peak.
gpt
The current anime (Wano raid) is some of the best anime ever. Before that though I agree it declined starting in dressrosa