Update: Later on the series became ridiculous. The author seems really into the "girls only like bad boys" idea as the female characters keep sticking to hero while knowing full well and hate the fact that he is a complete douche bag. The only non "bad boys" male characters are the MC and a group of failed "nice guys". On action side, the power balance between monster and human is too one-sided one would wonder how did they survive before they summon the hero. It's very sad since I liked how it started out.
TLDR: The story is great and feel kinda realistic. It is NOT a nice world where everyone except the villain is nice and you can solve anything through power. The MC although is the strongest cannot convince the friends he is trying to save. The villains aren't just doing bad thing for the sake of it and although their way of doing is bad, they have reasons for it, I sympathize somewhat. Same with the hero.
The bad rating may the the readers unsatisfied the MC can't just solve everything. But that's what I love about this series, life is never easy.
Spoiler
I really like how the author show what it is like traveling in the wild in a fantasy world. This world is just too terrifying, you can be done for without knowing anything, anytime and anywhere. The MC luckily survived because his other-worlder specs and he didn't even realize he just passed the dead door, I'm still shuddering thinking about it.
That aside, while the goddess is presented as a villain, I actually somewhat sympathy with her, like imagine an old ugly dude making a s*x doll with the same appearance of the young beautiful girl, she would totally lost it even if that dude doesn't happen to be a bad guy.
The hero and his girls are just a day dreaming bunch. While the hero would only save beautiful girls and don't give a sh*t about guys, he actually has his own principle that a man should be able to protect himself. I don't hate him that much though I sympathize the guys beaten up because of their jealousy.
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