[stylist] Critiquing things you don't like?

[Tessa]

Hi All
I'd like to get your thoughts on this issue. 
One of the members of our local writing group is writing a novel, we're critiquing it chapter by chapter. I find the story to be extremely distasteful, definitely not something I'd read not something I'm even remotely interested in reading. It's challenging when I do my crits for me to find anything good to say about the piece. 
Just wondering if anyone else has had similar experiences and how you dealt with it. 
Tessa