Vincent didn't like being unsure about anything. In fact, it was probably one of the things he liked least in this world.
He had all the knowledge in the world at his fingertips because of how far the internet had spread. Because of his perfect recall, he could look at something once and remember it word for word. Material knowledge was simple so he hated when he wasn't able to figure something less concrete out. He was used to knowing everything.
It continued bothering him for over a week. Seeing Maya only added to his confusion because he wasn't sure whether he wanted to take revenge for her or not. It would be simple enough to do a deep background check on her with a bit of hacking and find everyone who ever hurt her. The real question was why he would bother doing such a thing.
Vincent hadn't even taken revenge for himself because there had been no one left to destroy. Why would he do it for someone else?