So I'm at chapter 81 and I can safely say that the concept behind the story is top notch, but it's written poorly, not the grammar but the characters and their interactions.
They feel a bit too 2 dimensional with lacking personality. The harem is way to forced, no girls actually want to share a man irl. And so if you decide on a harem then atleast make it realistic. Otherwise the speech must parents made when defending him was cringe and unrealistic. I doubt anyone would ever speak like that, especially to someone unconscious.
The story is written in a childish way and his ability to just create any ability is just lazy writing.
To the author, May your skills improve. I wish you the best of luck.