These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Complete Monster: Empress Janera is extremely cruel even by Super Robot villain standards. Initially wanting to Take Over the World, Janera sent her monsters to destroy any resistance, but was always blocked by Combattler V. It is revealed Janera even oppresses her own people, the Campbellians, inspiring their true leader Deus to return and lead a revolt against her forces. Realizing time is short, Janera opts for a new solution against Earth: leading an attack personally, she deploys a bomb to the earth's core to destroy the planet and kill everything on it.
Goes into overdrive in Super Robot Wars Alpha 3, wherein even her allies aren't treated much better. In fact the Earth-destroying bomb is instead used in an attempt to destroy the Boazan homeworld, forcing Heinel to perform a Heroic Sacrifice to stop it in time.
Ear Worm: V! V! V! Victory! Combine, one two three...
from the ED: SO-NO-NA-WAAAAAAAAA! COMBATTLER V! V!
Iron Woobie: Hyouma Aoi. The amount of injury and pain he goes through in the series is astounding, and that's before you consider that he's an orphan.
Jerkass Woobie: Garuda is himself a victim of Oreana, and actually quite pitiful; given his inevitable fate as a Proud Warrior Race Guy. On the other hand, he may have depth (for a 70s Super Robot villain) as a character, but his ferocity and sadism towards enemies is genuine, and has made it clear several times.