It seems like, for some reason, that 'mainstream' 'journalists' are hating on Palworld, saying something along the lines that its bad, bland, it shouldn't have all this praise, you should ignore it, etc.
A game that's below $30, an open-world third-person survival creature-capturing game, or Ark meets Pokemon, which has been a desire by a percentage of Pokemon fans for I'd say around 10 years or more, is selling by the millions and in such a short amount of time. The developers made a game that the public wanted, and as you'd expect, it the public wanted it and got it.
Funnily enough, the game itself isn't anything special. Remove the theme and it is just another survival game that, in my opinion, I wouldn't have played myself, but the reason that I did, having played it for a few hours and will continue to play it for another few hours (until I get a flying mount) until I stop, is because of the main character can look decent/nice, and that you can capture Pokemon-like creatures as you have them do your survival labor.
Simply put, the market wanted X, and the developers provided that X.
Also, AI claims aren't true from what I looked into.