Why does Mark age so poorly

Nightwing, green arrow, maybe some versions of batman.

I don’t know jf the theme of if you have enough power and usefulness you can get away with thousand of years of murder is exactly a kids theme

I mean so far has anything really been pushed or is this speaking solely like production wise which does seemed improved

It’s worth noting that we see viltrumites from other species gradually lose their traits from other species, like starting out an fantastical color and gradually fading to a humanish skin tone. Presumably mark should in theory look more and more like nolan as he ages…yet he doesn’t age half as gracefully.