I don't know why prefering things for nostalgia is so frowned upon - like, yeah, someone who grew up in the 90s or 2000s is obviously going to prefer children's games and cartoons from the 90s or 2000s over children's games and cartoons from a later era. You can make all the arguments in the world for how media for children should be taken more seriously and they'd mostly be valid, but the reality is that very few grown adults will really want to - let alone - be that up to speed on the current state of the Nicktoons lineup. It's different when there's an attempt at legitimate analysis and discussion, but there's nothing wrong with just having Gen 1 as your favourite Pokémon gen or thinking of Cow & Chicken as superior to Steven Universe, and is kinda just the natural opinion most people will form if they were raised on the earlier works and grew out of kids' media - not to mention that even without nostalgia there are valid reasons to prefer a lot of these earlier works over their later counterparts (and yes, that includes Pokémon Gen 1)