The Litarena Website has several members who between them are either experts in grammar, historical research, editing and so on. Any member of the Litarena website can give expert and helpful help and advice. Our critiquing circle has one main aim and that is to act in the same way that a focus group does in marketing research. It's a bit like a peoples' jury or any other gathering of which you might ask for an opinion. The same is done in polls run by the media, and so forth. The usefulness, as far as an author is concerned, is that he, or she, gets to listen to a range of opinions given by people who understand how to talk about literature and bookmaking.
But in return that author is obligated to take part in critiquing other authors' work. Your critique might be a natural reaction. But, no matter what that reaction is, you'll be expected to explain to a reasonable extent why your response happened in the way that it did.
So, for example, "I don't like it," isn't a helpful answer.
A helpful answer might be, "in my opinion your language is too simplistic. You write things like, she didn't get on with her mum. But you don't explain why. That leaves me wondering why and I don't feel satisfied if a story leaves me wondering why the central character reacted the way that she did."
That would be a helpful answer.