A thing that will always bother me in these sorts of stories is when the side characters are too head-over-heels for the MC to ever call him out on his psychotic bullshit.
Bro complaining "I'm just a gate guard!" when everyone in that room knows he's the strongest in the city is so fucking brain-dead.
Never mind the whole "there's a high-powered magic serial killer in the city" aspect.
I get the feeling that this MC has just stood there and watched people die.