In addition to what Dekafox said about the pose making this figure look unflattering, I think what's so off-putting about how this figure looks is how it tried to have its cake and eat it too. Meaning, they tried to make his robot mode resemble the cartoon model, but also tried to make the truck mode look realistic and not at all "cute and chibi" like how it was for the original toy. The more realistic proportions of the truck have created a more stretched look that adds more mass to it, more mass that had to go somewhere in the originally stout robot mode design, whose legs have now become longer and lankier thanks to the more realistic truck bed being longer itself.