Agreed. Show. Do not tell.

For cases like Superman, he inspires the hero in each of us. He already have a stature. To degrade him into a joke (and let a dog piss on him) is another level.

Goku has an arch of its own. Childish at first but with the lesson learnt from a mentor archetype (the turtle Master Roshi) he matured up to become a warrior. The anime has been made that way to entertain and to attract audience.