Honestly, this dude being overpowered may seem Gary Stu-ish, but it does make his interactions more fulfilling as he faces opponents which underestimate him and the power difference makes his interactions so much more interesting. Him taking FMC's shit would be annoying if we didn't know that he could erase her from existence so easily, and his form, whilst not perfect, does make it more satisfying when we get the beat-down.