That game has the worst DLCs I have ever seen and probably will ever see.
wtf lol
Ulysses may come of as "edgy", but in reality, he is a pretty strong character. He has done horrible things in life to people, he has seen horrible things being done, and horrible things have been done upon him. Every single thing for which he fought in his life is gone, partially by his own fault - and the only thing which could have, in his mind, redeemed him, was violently taken away - in no less but a nuclear annihilation at the hands of ignorant Courier, a colleague, as if in some sort of sardonic twist of fate.
He is somewhat of a metaphor for the wasteland and humanity. Done great harm to each other, done great harm to itself, and when finally given a new chance, a chance to begin again, as in a clean slate after the Great War, humanity repeats its own history. NCR and Legion are two opposites of the same spectrum that is humanity embodied in its civilization. Dishonest, violent, selfish, destructive, corrupt, finite.
Ulysses is personally hurt by this. Being obsessed with history and its endless repetition, unable to come to terms that he himself has helped history to repeat once more, and his own grief over the fact that when given the second chance, hope in Hopeville, it was taken away from him.
His edginess is largely a by-product of a nihilist attitude he has come to harbor - or at least, thinks he harbors. Things he values are gone, are nothing but ghastly memories carried by the wasteland winds. He isn't edgy - he is a broken man, and what may come of to us as edginess is in fact the fractures of the shell which was once a human being, in all its best and worst.
Is there logic in his ways?
In a way, yes. Logic within his mind, but is it foolproof? Hardly. But is hardly the logic one can argue with, because with the humanity it is not the logic or reason that matters, as NCR and Legion have proven, and as the Old World had proven once before - the only thing that matters is the sheer capacity of destruction...and the ability to repeat history, because it is inevitable.