Besides the fact that I find Dukey funny, I pretty much agree with everything you said about the show.
For me the worst shows on that list is The Garfield Show (as its a disappointment), but most of all Casper's Scare School. I don't say this about many shows but it's bad art, animation, story, and characters has made me place this as one of the worst cartoons I've ever seen.
I thought American Dragon was better than Juniper Lee (though it's been a while since I've seen it), Winx Club gives me diabetes so I can't watch it, I did like the Proud Family and the thing I hate about SHS is the animation gets really bad and limited.