what's wrong with scooby doo?
Nothing really, it's just about the time that Scooby Doo originally came out, animation costs skyrocketed and you could see the cost cutting affects start to show in the quality of the animation. Hanna-Barbera was just about the last american animation studio to hold out NOT shipping it's work overseas. You can even see the difference in Scooby Doo's from the 70's to Scooby Doo from the 90's and more recently.
I just preferred more adventurous cartoons like Jonny Quest (60's), Space Ghost, The Herculoids, etal. If I wanted funny stuff, Looney Tunes, Tom and Jerry, The Flintstones and the Jetsons were always there. Scooby Doo just never did it for me.