In 1996 Pokemon Red was released and the franchise was RUINED FOREVER! The idea of Pokemon was so much better before it was published. Really, it was more fun to think about poket monsters than to play a GameBoy. (FYI Sarcasm)
Just Like Other 20 year old game franchises, each game IS better than the one before. Wheather you like it or not.
Consider the Following: The target audience of Pokemon is 10 years old. And you favorite generation of pokemon was from when you were 10. See any correlation?
Pokemon is still awesome! You just arn't young enough to get it!