This show is not bashful about having an overpowered protagonist, and while we do know it can be done well because of shows like One Punch Man and Kenshin... that isn't the case here.
There is very little story, fight scenes are lazily done, music hints at depth that doesn't exist, and everything always goes Shin's way.
The story is weak and transparent, there is no world building, and all of the characters are shallow and pointless.
I can't justify putting more effort into my review than the writers did their show, so take what I've written for what it is.