User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-95.90.224.203-20171101183240/@comment-31137559-20171103035025

Well if you want a Gary Stu go watch Sword Art Online.

Issei has drawbacks just like everyone else does. You can't expect him to be perfect. And what exactly do you mean by using more demonic power? Dragon Shot, Dragon Blaster, Crimson Blaster, Infinity Blaster, Longinus Smasher? What do you rhink those are? Issei isn't Ophis. He isn't an Infinite Dragon God. You can't just expect him to be flawless. And magic/demonic power isn't Issei's talent. Sure he shoots it out but as you've seen magic/demonic powers is the forte of those like Rias, Akeno, Rossweisse, Le Fay, and the other characters that mainly use their demonic powers or magic to fight.