It was understandable to feel mediocre in a place like Guardian Academy where real geniuses stood out like beacons of hope.
After all, with all things considered, he would also be much worse if not for the system and the fact that he was a time traveler sent with a special mission from the future.
He had experience, a golden finger and most importantly, his desire to save humanity to cope with the pressure that came from watching geniuses grow every single day.
In fact, he had a front row seat when it came to watching talents grow since his entire Squadron was filled with fearsome individuals from Elena Blake, to Indra Kusagaki, every single member of his Squadron, including Leah was a genius in their own right.
In any case, His circumstance was special so he couldn't blame those that were in a similar state but unfortunately couldn't do anything about it.
Thus he saw the need to liberate them first.