The more brutal I am in reviewing, the more faith I have that the book is worth my critical view. I won't bother reviewing if a book doesn't have some potential, so if you want my assistance to fix the errors, please feel free to inquire.
If you simply want to complain because everyone else reviewed nicely, I must then inform you that these sites often have people who go around reviewing nicely only to ensure a returned review to boost their numbers. I won't do that to you. If you write well, I'll tell you. If there is an error, I will tell you.
Honesty is best in these types of situations. This community would fail to serve its purpose if we did simply manipulated each other, so let's be honest.