The most astute observation is that characters on Danish kids TV are often completely, unapologetically flawed. This makes them relatable to kids, and kids enjoy watching them in all their dysfunction. And I actually disagree with the premise that this contains no lessons or morals. Children are able to see clearly how ridiculous and ill-advised the behavior of these characters is, and so learn to recognize it in the…
Additionally, my understanding is that Donald Duck had at least a few American fans. Though their numbers are probably limited to the few Americans who enjoy Looney Tunes, Homer Simpson, and the stereotypical sitcom dad (among other characters).