There is hate because this is business encroaching on art, which is always abrasive to artists and art appreciators. This tool adds content to the art that was not put there by the artist, making it a different derivative work.

Furthermore, it can be regarded as frivolous waste. Using AI in real-time to add new details to graphics as they are rendered dramatically increases the amount of energy it takes to run that game. If the gamer had to bear the real costs of these technologies, there would be no gamers.