I think he was already strong, but couldn't utilize his skills because of shitty party leader Benedict Phorr
I have the same impression. What he was missing was information and freedom to act as he wish. That was all. But damn, I want book like this. Info is gold no matter, if it's real world or made-up one :D
um, is this based on a novel? considering we didn't really get to see how he got stronger. it was very short and summarized