Counterpoint - Making it known to the developer that you USED to like their game, and that you think the AI images SIGNIFICANTLY lower the quality of the overall product, is really the only way you can make your opinion heard, and MAYBE cause change. Sure, there will probably always be some devs who will use AI, and a lot of them will continue to farm out garbage - that's nothing new, stolen asset games were around 20 years ago. But this is a game that didn't use AI, and people really liked the art it had, and c'mon man, what is a forum for if not to express your opinions about something.
We get it, you don't care about the change. Clearly a lot of people care about it. So, how about instead of complaining about people complaining, why don't you accept it or find another game?