This manga is very bad at explaining things. This dude said he started out at level 30. A level which is something like a master class swords men. And, he is currently level 46, pretty fucking high if I do say so myself. If he trains hard enough, he would be even stronger than the hero, but apparently he’s not. And, this mage says he’s just dead weight, so by that logic he was kicked out of his position of vice captain. He also has basic skills above level 30. So, he’s already powerful from the get go. And that pretty useless ain’t it? I mean, he only defeated that one demon general with ease. You know, that all totally makes sense! There’s absolutely no plot holes in here what do ever!