I haven't seen the cartoon, but there's not much point in comparing them. It's a lot easier to do a saturday morning cartoon than a movie.
The very idea of this movie existing was preposterous 10 years ago, the fact that they managed to make it alone is admirable, the fact that it's great makes it even more so.
What you're contending is silly. You are making the case that just getting the film made grants it the status of being a near perfect film.
One has nothing to do with the other. I applaud Marvel's approach and their achievement. That has nothing to do with the movie itself. Applaud the achivement if you like, I think they deserve kudos for it. But it still has nothing to do with the quality of what's presented onscreen. And the movie is decent, nothing more.