Are you unsatisfied the anime version or manga version? Because I discovered manga version first then they got adapted I was really happy. First season was fire. I LIKE IT VERY MUCH.
But then the second season is where things became not cool anymore. There are so many scenes that I wished they include like when John Smith Arc where alpha discovered Shadow's identity. The manga done so well. It was COOOOOOOLLL. And also that time Shadow crushed someone heart. I like that scene so much that I look forward for the second season but got disappointed.
Idk if they are following novel version of it. But yeah...
I don't know if you have the same opinion as me but I'd like to say my opinion, manga very interesting, I really like the plot a the art is amazing, I red it many times and I loved the story and the main character every single time.
I like even better the fact that it's not that type of harem.
Having said that, I want to add that I come straight after watching the second season of the anime, I want to say that I'm very disappointed by that an the reasons are many, first of all they completely changed some things like Rose's hair after entering the shadow garden of even the mother, that if the author how they changed the entire figure of the mother in comparison of the manga, he would probably pass out. But that are some "small" things that have been changed, but in the last episode there is the part where the MC go back in his word, that's my favourite part and they changed it entirely, adding useless things that weren't there in the manga. I mean, if they want to make their own manga they can, but why the fuck try need to change an adaptation of an already good manga?.
Said that, I just wanted to say my honest opinion. Very nice manga.