An idiot with a chronic case of boredom-induced writing and an overactive imagination.
Soldiers are often given gear they aren't familiar with. I can assume that these soldiers just had to randomly take a mecha. It's hard to memorize long keys too, so I'd write it down if I had to. In short, soldier was doing the best he could with what he was given.
Byakugan has no pupil. This version appears to only leave the pupil black while the rest is white.
Since when does entitlement need reasoning?
It ends up working out, yes, but usually, having obnoxiously overpowered defence is not the best offence. Yes, it can keep you alive, but it means you have to be a constant target that has little-to-no attack power to fight off enemies. Without a means to attack in return, all you can do is attrition battles, and the stronger an enemy is, the longer they can fight. Sure, there are rare occasions, like in this one, where having overpowered defence can be used well in offence, but his greatest powers lie in his shadows, which is technically a support ability.