Here's a serious question/some thoughts that I'd be interesting in discussing - Why does it matter if these American animations appear "crude and lazy", it's a film, it's not meant to represent real life. I understand that animation can be beautiful and moving if its detailed and captures real life in its drawing, but that doesn't mean it has to be photo realistic or highly detailed for the film to be good.
Of course not.
However, there are art styles that I dislike, as a fan of animation I don't need to like EVERY single art style. Everybody has preferences regarding art. I prefer more refined looking style, not realistic, because my favorite anime are never realistic, but different from this.
Such as this:
I also like more simple styled animation, in fact, in my top 10, Kaiba and PMMM, for instance, features very simple character designs and background art:
Those two are among my top 10 anime series.
While I found Monster, which features highly realistic art, to be quite boring:
Although I am reading the manga right now and it is quite fantastic. Indeed, the genius of Urasawa in creating very immersive and entertaining stories is at it's finest in Monster, the manga.
One of the advantages of comics over animation is that comics allow for much more detailed art since you don't need to drawn 12 frames a second, just several panels in a page. That's why there are American comics with highly detailed art, one problem they have, however, is that they are too realistic! They should learn with manga how to make highly detailed art that is still stylized.
I think plenty of these comic strips have more substance than some of the overly dramatic Japanese cartoons you love to pimp.
Now talked the highly experienced anime critic.
Don't take it personal when I criticize murican animation just because you are a murican.
While it's true Japanese are very emotional people compared to Americans*, hence their fiction tends to feature stronger emotions but it's also true that there is plenty of very light comedic anime/animation that I love as well.
Sadly, guard dog wasn't one of them. And it wasn't because it lacked depth (although I didn't see any) but because I disliked the art style. Most people who are into animation have problems with the art in American cartoons. The style is just too crude, usually because it aims at small children or because it is crude comedy (Family Guy). I enjoyed these cartoons more before I watched huge amounts of high quality animation, which made it harder for me to enjoy cartoons characterized by more simple art.
*Americans are, on average, less passionate than Japanese, Germans or Brazilians, for instance. So that they are mostly unable to enjoy any art featuring strong sense of theatricality, which also partly explains why Heavy Metal is not popular in North America. Of course, there are plenty of people who enjoy metal in north america as there are many who enjoy animation as well, but they are still small minorities in the population.