Listen old man, you're just forgetting the forgettable cartoons of your generation. Nothing has changed. If anything there is simply likely more art being made now, but in the same proportions of high-vs-low quality as before.

I mean you remember the the greats of the 80s and 90s, that's what makes them the greats! But how often do people talk about looks at Wikipedia The Little Lulu Show or Extreme Dinosaurs? As we go on, the good will be remembered and the rest will fade into obscurity.

Plus, kids have low standards. I remember begging my parents to take us to see Good Burger in theaters and I loved the hell out of it. Upon watching as an adult... yeah, it was terrible. That's not too say that shows shouldn't try to make good content for kids, but I do feel like a lot of adults don't realize how little it took to entertain them as a kid.