I don't care this corpo wars, for the reasons i stated. Capitalism itself is bad by nature, fight corpos is meaningless. Morever, i don't believe in power and significance of one man, even on the top. Not any Arasaka rules the corps alone, he hasn't absolute power, he is main stakeholder and chairman of the board of directors, he mainly does what the board and stakeholders want from him. So i see not big difference between Hanako or Yorinobu in chair.
Moreover, if such a giant corpos like Militech and Arasaka are going to war, this is a serious decision of many rich and powerful men, not the result of personality of some single person. Single persons very rarely defines global processes, usually they follow them.
But, i must admit, V can make a difference, by helping his friends. And that was, perhaps, the only good thing in the game - NPCs and side stories.
But that is the whole premise for this game.... So you just didnt understood the story.. thats all