What I find interesting his powers incomparision to the things the mc has fought before he is pretty f*cking weak.
Well, it was basically because Kanata didn't bother to level up, thinking he could speedrun things and move on.
He only had his unique skill and Origin translated skills. Even Rodiot/Idiocorte told him to go be an adventurer first to level up. He needed to use Lambda's system for at least a few months to fast level some fighter/mage jobs to increase his stats to be superhuman on par enough with Van to use his cheat skill to negate Van's much greater magic abilities and skills.
Van at this point has leveled out 5-6 mid tier jobs, has ~45 skills (2 in a higher tier) to Kanata's ~20. Even with a 7 year old's body repressing his stat growth, he is physically stronger & faster than Kanata, never mind mental processing power; only thing on par was Vitality.