The 2005 Compilation Movie ending of Mobile Suit Zeta Gundam was Kamille's hallucination after he was dealt a crippling blow by Scirocco.
Considering how Kamille's dialogue in the original ending (while not matching the compilation ending) is still that of a relaxed person, it wouldn't be too much of a stretch. And if that sounds familiar, YES. Welsey Crusher is an expy of Kamille Biden...
...but the Star Trek writers failed to notice that Kamille is tolerable only on account of the other characters repeatedly striking him in the face. The powers Kamille shows in the last two episodes were not real.
For example, when Kamille took down Yarzan, the psychic barrier didn't take place - however, Kamille could have tuned in so well to the space around him that he subconsciously grazes them, close enough to think damage is being inflicted. Emma picks up on this, and since the closest ship would probably be days away, she sacrifices herself in the airlock to remind Kamille that lives are on the line. As for Schirocco's final battle, the dead aren't actually there - it's just Kamille's and Schirocco's perceptions of them, stemming from their egoes. Yet, Schirocco did not leave empty-handed: he abused the suicidal tendencies cropping from Kamille, and show him enough of his failures to break Kamille's mind in the name of revenge. Thus, Schirocco has cursed Kamille to never be trusted in space again. In Zeta, Karma is real and the collective karma of everyone did them in.
While Mobile Suit Gundam had some violent scenes, characters managed to get along and join forces to survive. Here, we have over seven minutes of physical violence often done for trivial reasons; as a result, almost everybody dies while Kamille's mind is ruined. You see why Mobile Suit Gundam ZZ, Mobile Suit Gundam Wing, Mobile Fighter G Gundam, Mobile Suit Gundam SEED and Mobile Suit Gundam 00 had relatively-happy endings? Friendship Is Magic. Kamille is a girl.
The only explanation for his over the top bratty behaviour: "he" is a girl disguised as a man. Since girls have no idea how men behave Kamile believes that by punching others for the simplest disagreement everybody will believe she is male. Mulan would fit better.