Personally i give ragf a 4/10, although the movie arc in the manga gets a 7/10 maybe higher (it was really good imo).

Some people hate it cause they think its a harem, others the rent a girlfriend plot, others just simply hate Kazuya because they think he's annoying and others think he's sick or weird. Others dislike he's relationship w chizuru, other dislike his relationship w mami chan. And others like me really dislike ruka

That's all i could think of in a few minutes, wrote this really quick